Getting screwed by Northway Debit

I need to contact northway debit too, they took two payments out of my account that they shouldn't have. I'm in the process of shutting my account down and have found out that once my bank shuts my account, anybody attempting to ACH from my account will not be able to from that point on, and the bank said they won't show it as my owing anything. The only repercussions that could happen are that Northway Debit could say I owe them, IF I signed saying they could withdraw (continually) from my account and gave my bank acct information to allow them to do so.

I say, I welcome them to sue me so that I can have my day in court and tell the judge what they're doing to people. So, account is closed, they can't ACH anymore from me, and I guess let them do whatever they can do to try and get anymore money, yeah? But I want to contact Northway Debit to challenge what they are doing--anyone have that contact information? Thanks.