SKS Associates Northern Leasing Systems helped themselves to my bank funds even though i had blocked them new york, New York

SKS Associates/Northern Leasing Systems took $125 out of my company's account without authorization.

Backstory:
I closed my business account with Leasing Fiance Group (a company that has been purchased by SKS Associates) in January 2011. They continued to bill me for another 2 months even though I called them and told them that my account was closed.  After the second time I had my bank block them.

SKS Associates:
Then today my accountant was doing my books and asks me what the $125 charge from SKS Associates
is for. I called the number on my bank statement that's listed next to the charge. I found out it was the Leasing Finance Group account. The SKS Associates employee told me that they had done an audit and found that I owed them for back taxes on credit card rental equipment.

I asked the woman how they were able to access my bank account since I had block LFG. She said I had authorized them to take money out of my bank account. They even had the previous editor's name on the contract, not mine. And that was from 10 years ago! (I DID NOT authorize SKS Associates to take money from my account. My account was with LGF and was closed in January. So how can this be legal?)

I asked her to fax me a copy immediately of what the charges were for. She said it was their policy that they don't fax invoices and would send it to me in the mail. (They didn't even have our correct address on file). I then asked to speak to a supervisor. She said they were all busy on other lines. I couldn't even speak to a supervisor, what customer service!

I then called my bank and asked them how it was possible for them to access my account when I had blocked them. The banker told me that the company name change probably would have allowed them access since it was LFG that was blocked, not SKS Associates.

I have signed a dispute form with my bank and they will be starting a resolution process but I don't know if i will ever see that money again. I also asked the bank how to keep this company from charging me for other bogus bills under other names. They said they would see if there is a way to block them completely. If that can't be done then there will be nothing for me to do except close my account and open another account. But that's a crap load of work and i shouldn't have to do that because SKS Associates are helping themselves to accounts that they have no authority to take money from. I am furious that they are doing this and if this is legal then its open season on everyone's back accounts.
I will also be filing a complaint with the MN Attorney General's office.