Loan max title loans Fredrickburg Virginia

 I got a $1,500 loan through loan max title loans from plank road in fredrickburg Virginia and they said if I made a payment within 14 days after taking my loan they would give me a credit of $100 towards my balance so 6 days after taking my loan I made a $500 payment and they refused to give me my $100 credit as they promised so now I have made 3 payments of $500 in 40 days and still owe $772 left on remaining balance. If you take $1,500 loan out and every 3 weeks you make a $500 payment how do you still owe $772. I think loan max title loans should be forced to go out of business and made to reimburse everyone their titles and money back for overly charging people and ripping them off.