ABSA dissapoint

I have always thought highly of Absa, and never encountered any issues with them. However, for the past 4 months there has been R100 taken from my account each month, which states 'Unauthorized debit order fee'. Even though ALL my debit orders go off every month without any problems. I visited the Kolennade branch in January where the lady logged the issue and said I would receive an answer after a week. I did not hear anything from them. Then I visited the Queenswood branch in Feb, where I was given a different reason. Now the issue is still ongoing (4 months and R 400 later) and I have no answers. This is shedding a bad light on my name when looking at my bank statements. Please assist with fixing this problem asap. My ID nr is: ********** 088080 I do not want to be forced to move banks because of this. Please can anyone help. Kind regards Victor ********** 612