You cannot complain to eBay as too much time has passed to claim a full refund as you did receive an item not as described.
eBay have a 30 day MBG Money Back Guarantee policy, this is written on the right hand side of every listing. It explains if you receive an item not as described you have to send it back, at the seller's expense for a full refund.
That timeframe has passed, you could try your payment provider now for help with a refund.
Familiarise yourself with eBay's 30 day MBG link below, it can save you a lot of money in the future.
https://pages.ebay.co.uk/ebay-money-back-guarantee
@chucknic