any laws in california that protect against the high interest loans from companys like cash call?

are there any laws that protect us from companies like cash call? i got a loan from them in 2004 for 000, and 4 years later after paying them back 000, i still owe 00 because of the high interest rate. i was foolish back then to take this loan without realizing how much i [...] http://bit.ly/nw3rle