You're out of luck - WAY too long,
If you haven't received an item, you can open a case 3 days after the estimated delivery date (if available) or 7 days after the listing ended (if no estimated delivery date was provided). If you received an item and it doesn't match the seller's description, you can open a case right away. You must open a case within 45 days of the end of the listing.
Respectfully, you should do some homework on buying under the tab Customer Support.
