Fnb Not taking Care of its clients

My Account got Frozen without my Knowledge. Apparently by Standardard bank for *****. I dont know anything about a *****ulent Transaction on my account. Due to this I didnt have any Money for food this weekend. The ***** Department is also apparently not working over weekends. Fnb didnt even inform me about the Account being Frozen. Arent FNB suppose to take care of their Clients that has been with them over 15 Years. My personal feeling is that someone was blocking my account so that I cant operate my small business.