PS deposit problem...do I have a play here?

[dsalt]

I deposited $800 via moneygram onto Pokerstars...i got it up to about $4250 within about 12 hours with a tourney win...I proceeded to up the limits and ended up draining my account..somewhere along the line I guess PS deposited another $800 to my account while I was in the process of tilting the cash away because I just got an email today saying...
(keep in mind, my account is now at 0...)
We have been contacted by MoneyGram and they informed us that the
transfer
you made on July 28th was processed twice by mistake. Two transactions
were credited to your PokerStars account for the amount of $800 each
but
you have actually sent only one transfer.

I can see that you do not have enough money to repay this.

Please proceed to make another deposit as soon as possible using the
same
information we gave you for a MoneyGram deposit; then, email us when
the
new deposit is successful and we will proceed to send the funds back to

our local processor.

Thank you in advance for your understanding and cooperation in this
matter.

Regards,

Carlos
PokerStars MG Supervisor

seems a little suspect, had I known they deposited twice to my account, I would have accounted for that $800, but I guess I don't really have a play besides paying it, do I?