Need Ps3 game trial help?

i downloaded the 60 minute game trial to Prototype (on ps3) and i played my 60 min out, i liked the game so i bought it in the playstation store did the download and cancel after activation, and it still said expired, so i deleted the trial and went to the playstation store again to download the bought one, it was a trial and gave me another 60 min. so i payed $30 for an extra hour to play. and i cant even attempt to rebuy the game because my prepaid card is either empty or doesnt have enough left in it. how do i fix this? (i did pay for it in the playstation store and have bought other games such as god of war II and dantes inferno with the prepaid card there shouldnt be a problem)