Loan Max Title Loans Didn't explain Tucson Arizona

I needed to get a loan to pay my rent and I had seen a commercial for loan max and it stated that they just need a DL and title to get a laon, so I went in and borrowed $1,800 and was told that my payments would be $270 a month and that I can have that paid off in no time and get my title back.  On the 3rd payment I asked how much I owed on the loan and I was told that I still owe the full $1,800 because I'm only paying the principle and I asked why that wasn't explained to me at the time of the initial loan and the person on the phone couldn't give me an answer, she just said "I don't know, they are supposed to tell you before youu sign."  6 months later and I'm still paying the principle, as soon as I get my taxes I'm going to pay them off, get my title back and tell everyone I know to never go to them.  If I had kniwn that i was going to have to keep paying all this money and none of it would go towards my loan, I would have never signed!