Poor service from Cartrack Accounts Dept.

I ve more 5 years with carrack, actually this is my second car with them, it was okay all along until i changed my bank account for them to deduct monthly subscription, That was around July 2023. I phoned in after noticing that they are not deducting,(September 2023) they gave me balance i paid, my account was fine. - It happens again, i phoned again and was given balance and paid. After two days of my payment, i received a call from their legal department that i have been blacklisted since September 2023. These is first call received from them regarding that, nobody ever tell me about, they only telling me that i am blacklisted after 8 months.... my account was active with them while i am blacklisted, how is that possible? I called in to get answers, they can't find any communication that i was told.

i am very disappointed about how they handled my account - i don't know weather i should continue with them or what... very poor service from accounts department, i ve never see such in my life