Well Sony finally put their Welcome Back Pack into action last night and as seems to be their luck at the moment even that didn’t go off without a hitch.
Many users have been reporting issues with redeeming their free games off the network. A lot of users were repeatedly getting error messages while trying to access the store and for others downloads were just disappearing completely making it so they were unable to download the game at all.
Sony acknowledged this problem and published the following solution on their blog;
They recommend that you go to Account Management > Transaction Management > Services List. From
here choose ” PlayStation Network Promotions and select “PS3 Free
Games” or “PSP Free Games.” Click “Select Content.”, this should enable you to select your game again.
I think as long as you keep trying to push through the error messages you will get your free games eventually.