MTN Insurance is the worst!!

I've opened a contract in 2017 with MTN along with insurance. When it was time for me to upgrade I decided to rather cancel the contract (which I did) After the first month of cancelling the contract they still deducted money from my bank. After months of back and forth they notified me that I am still needing to pay the insurance on the device. They did not phone me or tried to contact me during this time to let me know that I need to cancel the insurance separately. They tried to deduct money for months. Again emails back and worth. Insurance is suppose to relapse after the first month of no payment but yet they tried to deduct R600 (double) in the second month. They even went as far as to place me in default. I owe them R1700 now for insurance on a device. Worst customer services EVER!!! I will NEVER open a contract with them again. Lack of communication to the customers.