Capitec froze my account

I have been using capitec bank for a while but yesterday I could not access my account, upon going to a brand I was informed that they have blocked my account, I was told there was a ********** transaction that occurred via cellphone banking. The funds I had are frozen with the account and they won't release them. They won't even tell me which transaction looked **********. My salary was paid to them and my HR department told me its too late to switch my salary now,which means I will not get my salary when its due. I don't think what they are doing is fair and not to mention the emotional distress I'm in right now. Are they allowed to do this. And why are they keeping my money and how am I supposed to do without my salary.