When a player is hacked the capacity will be say 4GB or 8GB and only really contain a 1GB or 2GB Flash Chip or maybe even less if you are very unlucky.
Follow this guide to see if your player is hacked:
http://www.mympxplayer.org/how-to-re...ck-vt2400.html
If the seller does not reply to your e-mails create a PayPal Dispute and you will probably get a full refund.
I hope this helps.