Tracker with a bad record of service and assistance

I had a tracker installed when I bought my car in 2008. In 2020 I changed my bank information and could not get hold of any assistance to pay via EFT. Yes I was given 2 account numbers which did not help at all as the ,listing on the bank was only Tracker with no account number. Needless to say that the service was suspended and even though I did request assistance i never got I ended on the short side having to pay for service I did not have not assistance to enable me to make payments. This contract was old enough to cancel as it seemed that I was still paying for my initial system that was paid cash! This cost me so much money that was just thrown away. I started a new contract. Then I got a shock regarding all the debit orders going of my bank account!!! The again I tried to get assistance, NOTHING till I mentioned cancel. I was then given the information that I was also debited on 1 Feb 2021 for March 2021 and that a credit was done immediately. Much appreciated! Yet how could i trust this setup, according to me contract was broken by Tracker by deducting a debit order not yet due which is *****. So a cancelled and now Tracker wants me to pay cancellation fee ..... after all that. So Tracker can do with your bank account as they which and give you service as they which but don't dare to cancel. Tracker you were in the wrong and how dare you make me pay for it.