You’ve gone about this the wrong way.

Why on earth would you open a buyer’s remorse return request when the item is defective?

Right… first of all, do NOT close the dispute. Once it’s closed, that’s it.

Secondly, get on to eBay’s Live Chat and explain that you stupidly opened the wrong sort of dispute; ask if they can change it to the correct sort of dispute.

Thirdly, if you have a smart phone, you can attach a photo. If you have a computer, you can attach a photo. Ask here for specific help if you need it.

Fourthly, the seller must pay return postage for a SNAD dispute. If (as I suspect) the seller is overseas (China?), the seller must arrange a satisfactory way to pay for the return postage (which must be tracked); if the seller does not it can it, ask eBay to step in when the dispute allows; you may not even need to return the faulty item. If that turns out to be the case, just destroy the item.

ASK here if you have any questions and before you do anything that might affect the outcome.