Stratford Career Institute bad material, illegal tactics and threats Saint albans, Vermont

I enrolled in the Private Investigator class and paid the fee and got the first materials. After reviewing the materials and taking one test I called a private investigator in my state and he said the class and the material wasnt worth the money or effort and was a sham. It wouldnt help me at all in the field. I sent a cease and decist letter about not taking money from my account and that I was withdrawing from the program. For 2 months after they kept taking the money from my account and I have not been able to recover it. It was ten dollars more per month than they had stated to me when I signed up. In the last 2 weeks I have gotten two letter stating to pay the full amount of 635.00 for the remaining program. (It should be 88 less). I called and told them I wasnt going to pay unless they were going to issue a certificate claiming I was done the course because I had withdrawn within a 60 day period. Im not paying for a class I am not taking and for a sham class thats not recognized in my state. Today I got the threat of an attorney if I didnt pay. Im still not paying!