Cartrack

I had a contract with cartrack and it elapsed in July so l told them that l will not renew it since my car was ******. I told them that am not buying a car anytime soon, so l will not continue with them. So l had to pay for July of which it was not a problem, my problem is the accounts department were calling me left right and centre but my case was never looked at by the client services. This month they debited twice and l managed to reverse one of the debit, eventually the account department started calling again and they told me that they are not even aware that l did not renew the contract. I am really annoyed, the bank charges me for these transactions and they will not pay me back those charges.