I bought a book from an eBay US seller. turns out the book is missing about 18 pages. The seller's listing did not mention it. It just said the condition was very good, and also the seller said "No Returns" on the listing. The package had been shipped via EBay's Global Shipping Program. I'm not sure if I can now open a dispute about this since if it requests a return, will I have to reimbursed for the expense of international postage? And if the seller says no returns, does that mean no returns? When I try to open a dispute, eBay's resolution centre wants me to put in a returns request. Not sure how to go about this. Can someone help?