I also did that after only paying $90 on a $200 loan. This, however, was through a company that was not licensed in my state. They didn't have my new phone number, but they plagued me with very nasty e-mails, stating that I broke the contract by closing my account and that was check fraud, which is a criminal offense (it's not) punishable by imprisonment, that they had lent to me in good faith, and that they would retrieve their money one way or another. I was scared, but I followed the advice of people on these forums and sent a PDL template letter, listing what laws THEY had broken and that I would only be paying the principal, as I was able. I also told them that I had reported them to my attorney general's office and asked them to investigate their illegal lending practices. I received a much tamer e-mail after that, asking me to call them to discuss payment options on the principal that were agreeable to both of us. They stated they were "willing" to drop any fees as they tried to "please" their customers and were sorry I was not happy with their service. You really have to be aggressive with these people.
Check with your bank about what happens if someone tries to put a debit through once the account is closed. If, like my bank, the account isn't officially closed for 30 days, they may allow that payment to go through (something my bank did). If your account isn't officially closed, it would be cheaper to put a stop payment, just in case AIP tries to put it through. I'm pretty sure if AIP doesn't try to put it through, though, they don't charge you for the stop payment.
If you need any more help, I'd be glad to help. Let me know.