Poor service and ****** money

I cancelled my policy in September, I was charged a ridiculous amount of money because I cancelled it prematurely. Old mutual continued to take money from my salary, when I asked I was told that I didnt indicate that I wanted to cancel or I want them to stop taking money from me. Every email I have ever sent was clear that I am cancelling my policy. Now I am told I need to fill another form in and I will still be penalised for premature cancellation. How many times should I pay to cancel a policy? Please help, I want all money back