I worked as a Billing Manager for a year at Tax Masters in Houston Texas, the most corrupt company in my 25+ years of professional accounting/auditing experience.
If you are not satisfied stop paying them immediately change you account number on your bank or credit card from which they are getting their funds.
Get a lawyer to call /write a letter to them for a full refund even if you where dumb enough to sign a contract.
The BBB of Houston has disqualified them from membership, AG of Texas is also investigating them.
Good Luck and spread the word.