FNB RESERVED FUNDS WRONGLY

In this week, I received money from SARS, Me and my Husband have a joint account, my husband noticed that all our money in our check account was put in reserved, after we transfer some of the money to our credit card. Upon contacting FNB he was told to contact SARS, which we have done multiple times just to be told that the audit was concluded and there is no hold on SARS side and we do not owe any money. We have contacted FNB multiple times and no one can tell us why this money is being reserved. (we have talk to people in the SARS department at FNB, the check account department and we have spent hours on the app chatroom to get this resolve with no avail. Can someone please help? Who can we contact to help sort this out as soon as possible?