SKS Associates robbery without a gun New York, New York

     I recently discovered that a company called SKSAssociates debited my account for $96.00, which caused my account to go in thenegative resulting in an overdraft charge. I did not know who this company was,so I called the bank to report a fradulent transaction. They gave me the phone
number of the company and after some investigation it turns out that SKS Assoc. is a company that purchased accounts from Northern Leasing, which is a company I had a contract with from 2003-2007 to lease a credit card machine for my mural painting business, which closed due to lack of business. 
     Even though my business closed I couldn't get out of the lease and continued paying on
it until my contract ended in 2007.  At which point we sent the machine back to them with a
letter telling them that they no longer have the right to withdraw money from
our account as our contract is over.
     But now in 2011, SKS Assoc. is claiming that they audited the accounts and we were not charged enough taxes on the machine while we were leasing it and that is what they debited our bank account $96.00 for.
     I checked with the Rockdale County Georgia tax assessor's office and they said SKS Associates did not report these supposed taxes to them that they collected. The county also told us that SKS would be the ones to pay the taxes on the machine as they own it, not us. I also don't believe it is legal to buy a closed lease and try to collect money on it four years later.
     We never gave SKS the authorization to withdraw from our account and I want my $96.00 refunded to my bank account immediately. They caused our bank account to go into the negative and now we're being charged $36.00 insufficient funds fee every seven days while the bank investigates.  Talk about adding insult to injury!!!  Hopefully SKS doesn't fool them into believing it's legitimate or else I'll also have a huge bill from the bank to pay.
     I have reported them to the BBB and also to the New York Tax Enforcement Office, as they did not report the taxes they collected and probably pocketed the money.  I am going to report these companies to as many authorities as possible and encourage everyone else to do the same so they don't victimize anyone else.