Hi ghiem .. If you want to protect your payment, and everyone should, claims must be filed within the 45 days PayPal allows..
http://pages.ebay.ca/help/buy/paypal-buyer-protection.html
Nothing can be done at this late date unless payment was funded by credit card. Call the 800 # on the reverse of card and request a chargeback. Write down all details of purchase/payment before calling. Cards have limits as well, so act now.