Seems you haven't opened a case for item not as described? Then, proceed this way.
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.
The case would enforce the seller to pay for a fully tracked return postage, but if you paid this, enter those tracking numbers into the case details. 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.
@taff123456789