I want my money back!!

Randmore has been deducting money from my account even though I no longer have insurance with them. I've called plenty of times and no one cares to attend to my query. It's been months now and each time I call I'm sent from pillar to post. The monthly debits are an inconvenience to me, not even mentioning the airtime I use to call them each day with no one bothering to call me back. I've recently spoken to a lady called Khanya and she also was no help. Anyone knows how I can fix this problem with the said company?