if the seller is no longer there ,, then it is down to the manufacture for warranty claims ,, it is there warranty !!!!!!!!! not the sellers!!
If your device is defective and the seller don't exist any more please contact us with all your buying details (shop, order, date, order number, detailed description of problem, ...)
I have told you many times ,, where and when I bought the phone !!!!! this has been going on since November ,, you sent me a new speaker,, that did not fix the phone ,, I bought the phone from ebay last may ,