If you played before the 1.03 patch then you will never get Payday I'm afraid and the Boosting Thread for this game is here:
Trophy Boosting Thread (Read First Post!)
All the patch did was make the situation worse for those of us who played before the patch came out. The best advice I can give you is to follow the advice in this thread:
Very important if going for Gozer's/Platinum and if it doesn't pop, sell your copy and forget it ever existed.