Standard Bank Insurance is making it impossible for me to cancel my policy with them.

I have requested three times via email for my building insurance with Standard Bank Insurance to be canceled and have yet to receive a response from them. I have now paid twice for my insurance this month because they just refuse to cancel my insurance or even acknowledge my email. They continue to deduct premiums from my account and when I call in to their customer care line they tell me to wait for a response to my mail. Wake up Standard Bank Insurance! You are leaving me no choice but to contact the Ombudsman and lay a formal complaint against you. You cannot hold me hostage and think I will just go away if you ignore me long enough.