direct debits not reversed by Standard Bank

for 3 months, I have asked standard bank to reverse 2 ********** debits to my current account - They reversed the one, but the 2nd one just stays month after month. I have written 3 secure messages to them, and they have responded with a reference number *** to say all resolved, but, on opening my account today, 25th June, there is no reversal of the ********** amount.<br> Totally disappointed with their service delivery