Bad experience

Contacted Miway for vehicle insurance. After receiving my policy documents I realized that I was covered for Market value instead of Retail. Called 4 times on the 17/5/18 to cancel the policy and was told someone from their Retention dept would contact me. Received 2 SMSs adving the same but to date no one has contacted me. I got my bank to reverse the pro rata premium in the interim while waiting for the return call. Today the full premium has gone off my account and still no call from the retentions dept regarding my request for cancelation! Now at 6pm I receive an SMS stating I have not being covered since the pro rata was not received. I don't want the cover. Could someone contact me regarding cancelation and reversal of my money!!!