ebay Fake Windows 7 software Internet

I purchased a copy of Microsoft Windows 7 on EBAY. A few days after I purchased it I received an email from Ebay saying the seller was no longer a registered member. I contacted ebay and they contacted the seller who inturn contacted me and assured me that I would receive the item. I received the item about 2 weeks later. I loaded it into my computer and registered it to what I thought was Microsoft. After about 30 days I got a screen message that this was not a genuine Microsoft copy of Windows 7. I contacted Microsoft and tried to register it and it was definitely a counterfeit copy. I contacted Ebay and explained all of this, they opened a complaint and tried to contact the seller. Ebay said I had to wait until Oct 16th to escalate the case before I could get a refund. On Oct 16 , I contacted Ebay and was told that the 30 day period that I had to file a claim had expired and I could not get a refund.