Do not accept cancelation on contracts

Mix Telematics Africa is a very sly company and yet i have been a contract holder with them for 8 years 1st 5 years wuth a Chevrolet Captiva and the last 3 years a V W Polo and a Nissan NP 200. We were not aware that the tracker battery were not operating no phone call from them nor an emergency SMS. The only time we realise our tracker battery is not operating is when they called to renew our contract and to increase our monthly payments in April . Then the sales consultant told us our tracker battery is no longer operating. We then decided to cancel our contract with them first telephonic and then via Email on the 15th of April 2021 and on the 6th May 2021 we received no feedback. We tried on numerous occasions to call the minute they transfer you to cancelation its a dead end. Since End of April 2021 and end of May 2021 Mix Telematics Africa send debit orders through our account. On the 8th of June 2021 we received an email from their credit department to place us on the credit bureau. Reason been we send the May debit order back. We sent them another email on the 8th of June 2021 and we tried calling to no avail. Mix Telematics Africa are a car tracking company who will receive money from you gladly with no service rendered.