If a gaming chair has a warranty you can contact the manufacturer for RMA. make sure you have your proof of purchase. Otherwise you go through the store where you bought it and ask them for RMA instructions. 

I wouldn't recommend going into a Staples store after the two week return window for anything. The employees can't do anything for you and are pushed on selling of the extended Square Trade warranty to the point that they are not going to look up RMA information even if they knew where to look. You have to keep in mind that they have to be a department head to even get 30 hours a week since they would then have to offer healthcare to them so they don't view it as a long term job. Also since Staples failed to buy out Office Depot/Office Max in 2015 the company has closed under preforming stores to the tune of 1/3rd of the retail locations in North America. So it's the kind of high pressure job in which if you do work your way up you are not sure if the location will be around in a year or two. I don't want to sound negative for the company just to know what to expect that you will be dealing with a employee who took a job at Staples instead of flipping burgers.
 
If you wanted to contact the company the best way to find the information is to flip the chair over and look at the bottom of the seat. That is the location they will have tags for legal reasons as well as the company contact information for warranty replacement.

Hope it works out for ya! Metal or not that isn't cheap for a wheel base though, a second-hand business supply store would have a ton of nylon plastic wheel bases ya could probably snag for a steal.
 
Bought an Alera Merix on sale and it uses a solid steel wheel base. Weighs a ton but the chair was built for people twice my weight so they had to balance it. 

Guess it's also worth pointing out that the wheels, base and hydraulic could be used with a future chair if the chair itself starts to fall apart.

@ JGLuxe, pic is missin, all I see now

This thread caught my eye because I was in staples a few days ago grabbing some printer ink and saw some gaming chairs by the checkout. I sat in one and noticed that the arms lifted out of the way which I like because arm rests get in the way when playing guitar. I looked at the base for footrests (none) and thought, meh, I'll check reviews first. 
It was comfy and "CHEAP" though.
 
*Edit, this is the one I sat in
https://www.staples.com/staples-gaming-chair-black-and-white-55172/product_24381063

STR1D3R_2
@ JGLuxe, pic is missin, all I see now

This thread caught my eye because I was in staples a few days ago grabbing some printer ink and saw some gaming chairs by the checkout. I sat in one and noticed that the arms lifted out of the way which I like because arm rests get in the way when playing guitar. I looked at the base for footrests (none) and thought, meh, I'll check reviews first. 
It was comfy and "CHEAP" though.
 
*Edit, this is the one I sat in
https://www.staples.com/staples-gaming-chair-black-and-white-55172/product_24381063

 
It's this one :
https://www.staples.com/staples-vartan-gaming-chair-red-53241/product_24326595?akamai-feo=off
 
The pic I posted was from reddit but since I deleted the thread on reddit, it deleted too lol!
 
I'll post the original pic in OP. I have had a couple of chairs from Staples, Actually my chairs have been from Staples and this has never happened before. The longest I've kept one was for 2 years and the worst thing that happened was it began peeling and it'd slowly drop down (Hydraulic gave out, easy fix).
 
So they're good chairs, I might have just got a bad one. It doesn't even look like metal to protect it from snapping, I thought it was, but it looks like it's another layer of "stronger" plastic.

Oh my god, The hydraulic cylinder was a pain in the butt to remove lol, but I installed all the new pieces and I have a regret XD The chair sits high as HECK!
 
I did read in the reviews of the cylinder that it sits higher, But I didn't think to check the height of the wheels as well, to put it into perspective, the highest the chair would originally go to, is the lowest the new setup goes to LOL.

Hoggle
If your feet are not touching the ground or not at a 90 degrees you might want to consider a foot rest to add some comfort to the chai now that it sits higher.

Bruh, I'm 5'11" and at it's highest my feet do not touch the ground lol!
 
But I'm using it at it's lowest, which is a perfect fit for my desk and all, I sit comfortably and no problems whatsoever.

I got my current chair from Staples... I went with this Tempur-Pedic chair. I've had it for about 3 years now and it's still super comfortable. The second I sat in it, I knew I had to have it. Their website had it $100 off at the time, so I got it for $200. I do remember they gave me some trouble with matching their own price... They nearly made me buy it on the website and schedule it for pick-up.