Ebay allow you 30 days from receipt to start a case and return an item.
After that, it is between you and the seller.
Generally, you can start a chargeback with your payment provider if you buy an item online which is not fit for purpose. The time limit for such a case is 120 days and you are just past that.
If you bought from a UK business seller you could try ringing them or writing them a letter.
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)
