Poor service ABSA Centurion Mall

I am very disappointed with the service of the ABSA branch in Centurion Mall. I have tried to contact them numerous times to sort out a mistake on their side, but to no avail. I have also visited the branch 3 times, but each time there was a different excuse as to why they could not assist me. The manager was also supposedly going to contact me, since nobody else is authorised to assist me, but it has been over a month and I have received no communication. I do not stay in Pretoria so I cannot go to the branch again.