If the item is faulty and you are still within 30 days of the item's last estimated date for delivery, then listen to no more of the seller's excuses, they're using delaying tactics, act very promptly now. Also, if the seller wants their item back They pay for that tracked return postage.
You have received an item not as described, so you are guaranteed a full refund under eBay's 30 day MBG, Money Back Guarantee policy, if you claim within 30 days of the item's last estimated date for delivery.
You then go right of the item in your Purchase History, and from More Actions select Return this item, selecting the reason... Item .Does Not Match Description or Photos.
The seller has 3 days to accept the case, if they don't , you need to escalate on day 4, or within 30 days, and eBay will step in and force the refund.
If the seller wants the item back first, they need to pay for a fully tracked return postage. On receipt of their item they have 48 hours to refund you. Again, if they don't, you escalate the case.
Do not close the case early for any excuse or promise the seller may give, and do not forget to escalate.
If this timeline has lapsed, you'll need to turn to your payment provider for help with your refund. If this was purchased from a UK registered business who is not not upholding that year's guarantee, ask Citizens Advice for your next steps here.
@lucieana