As a general word of caution, I always check the seller's feedback before buying anything, it doesn't have to be 100%, but if there any negatives, I always have a look.
The description of the item should have given its condition.
In this case I would have checked to see whether the seller had a return's policy in case anything went wrong.
I would contact the seller first, if they are genuine and value their account status, they should be happy to help
Caveat Emptor!!!!