Unauthorised debit order amounts

This Company Called me to advise me I qualify for a loan, I took out the loan with no success, after canceling with them the keep on debit ordering my account with R49, R29, and R35 amounts of R113 going of my account each month a went to the bank to do a reversal but they just don't quite with there debits its cost a Ned bank client R35 rand to do reversal plus the bank sms alerts is off amounts lesser the R50 goes unnoticed the bank advise me now to close my bank account and open up a new one because there nothing they can do DEBTDOCTER is no joke they for real.