Stamps.com review: I want the account cancelled that my bank information is on

In 2021, we found that Stamps.com had been debiting money out of our account for a long time after changing accountants. $17.99. I called the company to find out why and who signed up and who authorized this. My business partner and I are the only two access points to our bank company accounts and he does all the outside in the field stuff. I handle everything else. I knew that had previously back before 2006 inquired about how their system work but I never signed up for anything, nor did I receive or download one item, one stamp, not one of anything from them. I called them and was told they could not find an account for us under our business name, personal name, address, previous address, phone number, email nothing, but yet recognized they were taking funds out of our account. Yeah, I found that bizarre as well. "Yes, we are taking funds out of your bank account but we can not find an account for you." My bank even provided reference numbers of the transactions so they could find the account. I was transferred to someone in security who actually asked me if my bank was through BBVA Compass and was my account number such and such. I said yes. She said she was going to escalate me to a different security dept to get this handled and provided me with an account number to give them. David finally picked up after about and hour hold and I explained the situation to him and gave him the info that the female gave me to give him. He said he could not find it. I said then how did she give me the account number and verify my bank acct info. He then found it but said being I could not verify the name, address and email that he could not cancel the account. I said BS, I want my banking information REMOVED from that account. He repeated over and over "I can't help you". I asked for a supervisor to contact me. After calling multiple times a day for weeks not ONE person, supervisor or manager would call me back. I was told by my bank and attorney to send a revocation of authorization and withdraw any authorization to taking money from my account. I mailed and emailed the letter along with the revocation and stop payment request from my bank. I never received a call but received an email. The email stated that if I thought identity theft was an issue to call their "award winning customer service". Obviously she didn't read the letter or she would know we had already been down that road for weeks which is what I put in the response and attached a copy of the letter, so she could understand what was happening. I go NO RESPONSE FROM them at all. No more charges were taken out after my bank did the stop payment. Now 2023, I was doing bank statements and now since June 2023, they are again taking money out of my bank account ($19.99 a month, yep they gave themselves a $2 raise) without authorization. I have called them again, filed a complaint with FTC, waiting on USPS Vendor Dept to call me back to make a vendor complaint and now had to do a written statement of unauthorized charges through my bank, again. Again I have not heard back from one person at this company.