You can't leave Feedback after 60 days.
You may be able to do a follow-up to the Feedback the seller left if they did leave any.
Too late (45 days) to file claim with either ebay or Paypal.
If you paid with a credit card you can try to do a chargeback by calling the 1-800 number on the back of the card.
Credit card companies also have time limits but all companies are different.
If you do try a chargeback have all your info regarding this sale handy.