Nedbank car insurance debit my account after requested to cancel on their own date not one we agreed upon I was charged unpaid by the bank 3times in 1month

I took new policy nedbank before it start the 1st debit then decide to not continue with nedbank;i called where ive been sent from.pillar to post to cancell I sent bunch of emails that were not responded too till to date.1st debit of R330.00 admin fee was charged on 2/10 the full premium couldn't go through because we're insufficient funds in my account again i.made another calls where I spent morethan 45min without being transfer to the right people instead I am being ask who is my insure.Mfc;Atogene I had no idea because I took the policy with Nedbank.we agreed on the 1 of each month for my debit nothing else.now the policy was not canceled as per my request left my nedbank Cheque account Negetive and I was charged R60.00 for unpaid i again on the 17/10 they attempt debiting and the we're no funds I was charged again R60 X2 in total now I have been charged R180.00 on unpaid of 1 transaction that I requested cancellation on time again a R59.50 ref Oct Extra that too I was charged R60 for that Why? I never told nedbank insurance to debit my accout anytime they want I got paid once .i am new in this bank September was 1st month my salary came through nedbank.i wasted my time calling without assistance revers my R330.00 Admin fee ;unpaid fee because I never had an agreement with them to debit my ac count on the 17 .nobody wann take the blame thy keep on pushing you to one another.i need that money charged for unauthorized Unpaid on 17/10 Cheque R60 X3 for 1 and same debit order in 1 month