Cartrack keeps debiting amounts on my account that we did not agree on and they are not providing services that I have paid for

For the past few years I have been using cartrack and I was happy with the service and after I bought my second car I added it too. Problems came when I sold the first car and decided to cancel services for the car plus a year prior I had added another service which had a contract of 2 years.

And I was told the cancellation fee is a R2,680.00, which I agreed to pay for but also requested a payment arrangement which was broken down to amounts that I can afford to pay.

July they debited below amounts as agreed R249 (services for the new car) R893.34 (cancellation fee)

Aug they debited R249 (19Aug2023)_ services for the new car R893.34 (21Aug2023) _cancellation fee R500 (25Aug2023)_? R373.32 (31Aug2023)_?

Yesterday when I called and explain to the cartrack agent that I am unable to access my app, she said its because I have an outstanding balance and whether there was an agreed arrangement or not the app won't work until I pay in full for the cancelled car

Which does not make sense. Then what was the purpose for the arranged arrangement? which I paying. And why was this not explained to me? And why services for the other car that I have already paid for, I can't even get the benefits for my money? I can't do a simple carwatch but I have paid for the service And why do you keep debeting my account for amounts that we did not agree on?