on dec. 14 i bought a watch from e-bay and paid as soon as the auction ends...it was free shipping so i thought the seller would use the cheapest way to ship my item so i waited and still haven't receive my item, so i contact the seller and she said that the package already arrive on Dec. 18th and she gave me the confirmation number so i can double check it if i dont believe her and it did say that the item have already arrived but how come until now i still didn't recieve it...i contact USPS but it didnt do much help...what should i do? Should i go to USPS and try to see if my package is there? -Also one time, my aunt sent me a package and they gave me the wrong keys and i have to go there to change it...is it possible that the USPS gave the key to a wrong person?