Discovery/ FNB ******* removal of funds.

I had funds deducted from my account *******ly. My installment shouldve been deducted at the end of the month and they decided to deduct it in the middle of the month without my consent. I phoned Discovery Card to flag this removal of funds, and though they passed the blame onto FNB and said the issue has been addressed with them and is being dealt with by them, i have not received any call explaining the ******* removal of funds from my account and how this is deemed acceptable. Very very disappointing.