Netstar refusing to cancel my contract - This is unacceptable

Good day

I have cancelled my contract with this company over the telephone, I was then requested to send an email with all my details including the car details which I don’t own anymore. This I did on the 26th of July 2022. Till to date I have not received any feedback from them instead they are deducting money from my account. Such *******…I want my money back and I’ve been calling them several times which they’ve tried to convince me not to cancelled. How do I pay for service which I don’t use…I do not even own a car for that matter . This is totally unacceptable!