Fee increase without notification

I have a Gold cheque account with ABSA and have been doing rebate banking for years. In January 2015 I picked up I was being charged account and transaction fees and went in to my nearest ABSA branch to inquire. I could not get answers and waited a month for feedback. In February 2015 it was the same story and went in again and was helped by ***x (who was very helpful). She immediately picked up something wasn't right and two days later she gave me feedback: \Our pricing went up on the 1st of January 2015. Our minimum monthly account balance for the Rebate Banking is now R15 000."I found this quite disturbing. The terms of rebate banking was changed without notifying me. Due to this I incurred more than R500 bank charges that could have been avoided as I have another account with R***k in it linked to this cheque account and just had to transfer R5k to meet the minimum amount for rebate banking. Also your staff weren't aware of the change in terms in January and couldn't advise me on what was going on...further leading me to incur bank fees. I believe this bank fees could have been avoided have I been notified in advance or advised by staff when I inquired. Unacceptable """