The time of purchase is important here.
Are you still within 30 days of the item's last estimated date for delivery, then you can claim a full refund under eBay's 30 day MBG, Money Back Guaranete policy.
Read this policy it's on every listing, right hand side just above the item specifics, follow instructions there to open a case for item not as described.
Depending on when you bought this item, if over the 30 day timeline, eBay do not offer warranties and guarantees past this timeframe, you may be able to turn to your payment provider for help with your refund.