Utterly Disgusted, Disrespectful and Unauthorised Access to My Bank Account!!!

I have a cheque account and a credit card with FNB, and today they showed the most disrespect I have never experienced with any bank. They called on a day or 2 ago regarding my credit card, I advised them that by the 1st of each month I always make the required payments to my credit cards so I did not understand the purpose of the call? Then this morning I see an amount has been deducted by FNB from Cheque Account to My credit card account, which was a huge shock to me, because I have never experienced such a thing ever in my banking life before, and this utterly equates to *****ing, which is unacceptable!!! FNB is taking advantage of the fact that both my credit card and cheque account are with them, and I will gladly taking my cheque account off to Capitec, as I will not be treated this disrepect , ever again! If that money is not reversed immediately, I am moving this month, Capitec will respectfully have my business! Thanks you!!! Utterly Disgusted Soon-To-Be-Ex-Customer!