What do do about this Party error

[Pokeraddict]

So I made my deposit at Party. I had to email them to get them to manually adjust my account for the bonus. The bonus gets added. After about 6 hours of playing i see how many raked hands I have played. Pokertracker says 615, my bonus account says I have played zero hands. I email them 4 times, I finally got someone who had a clue because the first emails were "we've added this bonus to your account" well no **** you have. Finally they tell me they cant add the hands I have already played.

What BS this is obviously their fault, what can I do to convince them to right their wrong? I'm considering a pitch a bitch to Casinomeister as this is about 100 they are trying to steal.