The service at FNB is horrific!

I had a positive balance in a Revolving Facility account. Received a SMS message on 7 November 2022 to say there has been a "Bank Adjustment". The balance of the account went to zero, but the money was not transferred to any of my other accounts. I have been on the phone to FNB all morning. Ended up with Personal Banking and has been holding now for longer than 15 minutes and he still has not come back to me. The service from FNB is absolutely **********! I have had years of loyal service to them, including student loans that have been paid up and now this?????