Account Frozen without any communication

I have a business cheque account with FNB. Apparently my account was placed on hold but there is no reason why it was put on hold. The person who did it is only known as Lauran and I can’t get hold of him or her My main problem is that I was not told why this happened. I only learnt about this where was trying to transect. Now I can't get the help that I need. No one is giving me a straight answer. I am being referred to this and that person and I now I am sick of it.

Can I please get my money.

This is bad service.