I think the first thing I would do is close your bank account so they will not be able to debit your account anymore. Unfortunately, it really is important to do that, since it appears PDL's are illegal in the state of New York, and they will probably stop at nothing to get money out of you. I'm pretty sure all you need to do is pay them back the principal amount. Get a new bank account but do NOT give them that info. You will need to get a physical address for these companies, my choice would be to send them money orders, and according to what I've read here at this forum, the best place to do that is the Post Office, because those types of Money Orders are traceable. Keep EVERYthing, all correspondence, all contact with them (take notes if you have to), but keep EVERYthing. You also need to report them to the FTC, BBB, your attorney Generals office, AND your Division of Financial Institutions. Here are the links for you state on each of these, you can file complaints online. 
http://welcome.bbb.org/
http://www.oag.state.ny.us/complaints/complaints.html
http://www.fcc.gov/cgb/complaints.html
http://www.banking.state.ny.us/ccs.htm
Hope I gave you the right links, I'm pretty sure I did.