Frozen account

I am in complete awe of the service I have received from FNB my account was frozen without any notification from FNB. I called in to find out what's the cause and how to resolve the matter, 5 days later I am transferred from pillar to post no one been able to assist they keep on telling that someone will contact me to assist. I am considering closing my account with them as soon as they release my funds, the service is really poor.