Seller not responding to faulty item

[nice-3440]

Hello, recently I have purchased a drawing tablet from Gaomon. It arrived June 29th. The tablet is unfortunately not working. The display flickers, I have installed the newest drivers, tried multiple computers, multiple ways of connection, and nothing works. I contacted them about this and they asked for a video. eBay does not allow videos, so I emailed them. It has almost been a week since I even got a response from the seller. What should I do? Thank you. 

[kensgiftshop]

Go to your purchase history and click return item and select, the item doesn't match the description as the reason.
The seller will have 3 days to accept the return and pay return shipping or refund without returning.
If they don't, return to the case on day 4 and ask Ebay to step in.

[fab_finds4u]

https://www.ebay.com/help/buying/returns-refunds/return-item-refund?id=4041

[ms.rodriguez*]

Do exactly what the others told you. In the meantime, prepare the tablet to reship it back to the seller.  DO NOT close the case. DO NOT accept another item from this seller. You want a refund.  Follow the prompts exactly.