Absa changed account and charging excess of R500

I used to be on a student account as I was still a full time registered student during 2015. In september 2015 absa unilaterally changed my account to a pay per transaction causing me to pay in excess of R500 pm month in fees. I enquired at cresta branch which informed me that the account was changed in September 2015 and that a dispute will be lodged for a refund. Its been almost 2 weeks and no one even contacted me regarding this misuse of my trust in Absa. I have been with the bank ever since the volkskas days. Probably time to change to a bank that will not unilaterally change my account without notice and then overcharge me 5 fold what i shouldve paid if I were on a bundle account