Regent is billing me for services not requested

I joined Regent in March. I was advised my policy would be R345 unless I opted for car hire in which case it would be R450. I said I did not want car hire. I have been debited R450 this month. I have spent a total of 30 minutes to the call center and emailed the agent who helped me with the policy. No body answers the phone and no reply to my email. I would like this sorted as a matter of urgency. I do not have the time to spend hours listening to a phone ring.