I have not dealt with Superior Debt Services on a personal scale, but there are some members here who have taken their program. I have not heard them complaining against the company.
However, you need to be pro-active on your agreement signed with them. Read the contract very carefully and see if everything has been mentioned properly.
Insist them to send you the monthly statements about how your money will be applied to the creditors. It is better to do the correspondences in writing.