De*****ed by Clientele

I have canceled my policy with clientele and phoned them to check if the got my email and each time I phone they tell me someone sinior will call me back and send me the email for cancelation. No one has phoned me but I still keep on phoning them but they continue to debit my account each month. This is so wrong because even when I try to reverse the debit order it doesn't allow or even for the banks to stop it. I canceled my policy because I have been paying but each time I need their services, they do nothing. When they advertise they promise us to help in time of need but when that time comes they tell you that you must wait for 48hrs and thereafter they still do nothing. Please I need Clientele to reverse my money that they debited after my cancelation of their policy and STOP debiting my account.