Felt like ABSA ****** me!

I recently sold my first property and was shocked to find out that ABSA bank was penalizing me more than R27,325.25 just because I didn't inform them 90 days in advance of the intent to sell my house. This is apparently some policy with the banks but who on earth would remember such a thing when you have been paying off your house for the last 10 years. I feel ****** of my money and feel that this type of behavior is unconstitutional and that its completely unfair! When I escalated this I was simply told that is the way it is and its policy. I simply do not accept that, how can you do this to people - you KNOW its unfair and you KNOW you are taking money from people!