********ly deduction

I requested Metropolitan to cancel my funeral cover on February 2018, they never came back to me but kept on deducting, I physically went to one of their branches and they phoned head office I told that my cancellation letter was received but there was no policy number, they never phoned me or emailed me for feedback but they have contact details, they also has the policy number that they are claiming that I dint write, so I really don't understand why should that the be a problem, I was then informed that I must write another letter which I did that was in December 2018 till today February 2019 no feedback from them, but they are still deducting. their service is very very poor, I don't know what to do anymore now, Please Hello Peter help me I need my money that they deduct without my consent now.