Locked business account

I run a digital business and recieved funds that were flagged. It’s been over a week now and no one from Nedbank has contacted me with regards to what the problem is. It’s almost like waiting for a prayer to be answered from their ***** department because even my banker can’t get ahold of them. I’ve never felt so helpless with a bank. It’s very disrespectful when someone can lock your business account without giving you a call. And embarrassing when you try to do a business transaction and your card declines and lose business. You have to chase the *****/forensic team responsible freezing your account for just a reason why they froze it imagine how it will be so have my account up and running. Terrible !!!!