R750 penalty for their mess up

After FNB failed to let me know my Flexi Fixed Deposit account was maturing, they re-invested the money automatically, again without letting me know. Then when I try to access my own money, within the same month, I must pay a R750 penalty. FOR THE BANK'S ERROR! When I contacted the bank I received generic, cut and paste responses and they clearly have no concern for me as a client, only for what they can gain financially. The joke is that future investments WOULD HAVE been much greater, but I will obviously be taking my business elsewhere.