There is not really anything you can do via Ebay.
You have to open an 'item not received' case within 30 days of the latest estimated delivery date to use the Ebay Money Back Guarantee.
Most payment providers give you 120 days from purchase to make a claim so you might just be in time to start a chargeback.
Why on earth have you waited so long?
"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)
