If you didn't open a case, then how can it be resolved?
Open a case now but make sure you open a case using the reason "Not as described" and ebay will provide a reply paid label at seller's expense. Then if tracking shows as delivered back to seller and he does not refund, THEN you can escalate the case to ebay.
It does help if buyers actually read the Money Back Guarantee, which is on EVERY listing top right and follow the correct procedure.
