My bank account was not frozen as well. Maybe because I settled everything before I told them that I resigned. But In anticipation, I withdrew most of the money before it gets locked in.
Received the last salary on the Last day of service and then closed the account from NBAD/First Arab Bank. No hassles experienced.
For info: As I was told the Bank accounts can be left Active(even w visa cancelled)but with a monthly maintaining balance. If it goes below the minimum, you'll get charged 25dhs per month. That's with First Arab Bank(NBAD).