SKS Associates Mad an unauthorized withdrawl of $70.03 from my business account and will not return my phone calls Bremerton, Washington

SKS Associates withdrew $70.03 from my business checking account without any prior authorization and they do not answer my phone calls or return my phone calls. I do not lease any equipment and in fact own all of my equipment including my credit card processing equipment. I am aware of northern leasing who is now SKS Associates has been trying to get me to lease from them for years but I never have. I am in the process of disputing the transaction and may have to close my checking account and open a new one to stop them.