Well, I must admit I have the same problem. Trying to cash-out for 8 days now, had my account locked out due to 'discrepancies', sent a copy of passport and utility bill 3 (!) times and still no luck.
they are very unhelpful in emails which all seem to be automated. I find this all very strange, I have never really played on the prima network, although I've created an account on Crazy Poker.

So my 300 bucks are locked up somewhere in the Golden Riviera limbo. I would advise people to avoid the site, never had any hassle like this in the 7/8 other sites I play.

Maybe it's because I'm Dutch, you never know.

Edit: The funny thing is, they also asked for a front and back copy of my credit card. This while I've never used a credit card with GR. I try to do everything with neteller. I've obviously refused to sent these copies, wise?