Complaint Review: Member Solutions

My daughter signed up in karate, did her full year and would of continued had these problems not come up. My son joined after almost a year of watching his sister's class. My son is a special needs child with asthma. At the time of him signing up, his asthma symptoms had been maintained and had no serious problems after a month or so his asthma became bad again. I had dr's notes and such. I called the Karate place Master Kai Mixed Martial Arts and they had turned their billing and contracts over to members solution. I always paid on time and even paid past when my daughter's contract was up. They kept billing me because they said it was on auto renewal. I never was aware of the auto-renewal this was never explained to me. I tried to do this amicably, even offered to pay a fee to break this contract. I always have paid my bills on time and have good credit and this has been going back and forth since September 2013. I don't want all my years of doing the right thing and this one place is going to sabotage my credit. I would appreciate any help you can give me. I can no longer afford to keep paying for services that I am not getting. I am already under stress dealing with my special needs child.