Failed payment arrangement on replaced device due to faults on old device

I have been with cartrack since 2013 with 2cars,recently my unit on Bmw had faults and was advised new device is needed(R600). 3months payment option was arranged but after 1stmonth, started getting over 10xcalls weekly for R400 settlement. I said I have a payment arrangement but it fell on deaf ears, 15 June 2020 I get debit order of R400 after numerous plead to adhere to payment arrangement. Due to broken trust, I have immediately canceled my calls with Precious from client services on a basis of being treated unfairly & bul**** on top of payment arrangement. I have never asked for the device nor I have ever delayed on monthly premium even during Covid19 pandemic challenges I had with no salary. I rather be with a tracking company that adhere to its procedures and understand its client. I pay 2x vehicles more than what other competitors can offer which I have declined numerous times.