ABSA motor insurance

absa financed me for a car years 2 ago, 5 months ago they called and asked me if i had a car insurance i told them yes and they asked me to send them proof of the insurance which i did but they still put a car insurance on my payment i tried to cancel it but for some reason they say they never found the proof of insurance even tho i sent it multiple times and even went to the bank to cancel it but with no success and they still deduct R700 from my account every month. I would highly appreciate it if ABSA could get back to me and actually help me solve this problem.