I still have not received a phone call from FNB on what the situation is with the money that was taken from my account

I still have not received a phone call from FNB on what the situation is with the money that was taken from my account. This is the 3rd business day , my account is currently on a minus. I have reached out to them on Twitter as well I need my money back. R1300 is a lot of money!!!!!!!!! I have a case pending.I need assistance please