Sst / Unfair Practices

SST is an incredible money making machine, my due dates change billing cycle to billing cycle, account balances seem to go up much quicker then they come down, they want $10.00 to make a payment to them via telephone, they have fees for everything and they do anything nad everything to find a reason to bill you for them. Requested my account have someone audit it but was told it would freeze my account, but bill would still be due, and would cost me $50.00. My account balance seems to go up by 5 - 40 dollars each month, and yet no one can tell me why and they do not seem the least bit interested in figuring it out because it puts money in thier pockets. I do not know where to go or how to proceed to get this looked at by someone with ability to do something about them.