Pathetic Service by Discovery Card/Call Centre Staff

On 16 February 2019, I deposited an amount of R100 thru the FNB teller machine which reflected immediately into my account however a day later later I was shocked to realise that the bank had charged me for declined authorisation fees when I had sufficient funds available prior to making an transaction on the account. I was sadly charged a total amount of R63.00 for these declined fees which are outrageous considering I had sufficient funds available for this transaction . Lastly their call centre manager Nancy Mahlo was so arrogant and rude to me and offered no solution to my query therefore I would like to appeal to Discovery to stop with their money making ****s under the disguise of DECLINED AUTH FEES and reverse these charges at once.