Santam to pay me back

Santam I needed up my account. I have cancelled my insurance and even sent an email that I am cancelling my contract with Santam.

They went ahead and debited my account and left my account on a minus which affected my Ebucks points.

Dear Santam, please repay me for the unpaid debit order that you cost me and also messing g up my account where I ended up lossing R700 cash back with FNB.

Please fix this