No way to cancel policy.

I am so disappointed at the level of service I received. I have been trying to cancel my policy for the past 2 weeks I have been transferred around until my airtime ran out, after waiting for 20 minutes to get to a consultant. I have sent numerous call back requests and I have not gotten any call from them in the past 2 weeks. They will then want to charge me the full instalment when I no longer have the vehicle that is insured with them.