Account Blocked NO FEEDBACK OR EXPLANATIONS!!

So this is probably how people end up killing themselves because banks block your accounts without any valid explanation. On the 29th my entire profile was blocked, I recieved alerts that it's due to "*****" I've been on multiple calls with FNB ***** division but with no luck I've not been able to find out exactly why my account is blocked and what do they require to unblock it. I have a catering business and need to pay my suppliers for the weekends event but I can't, I feel like running away because I don't have answers for my client. The funds that was deposited into my account has also been removed, is this they way of *****ing from hard working people?