Standard Bank Unfair Treatment

Standard bank unfairly froze my account over a civil dispute without any investigation. They did not inform me in writing and I only figured it out when I was trying to make a transaction. It's been almost two weeks of me submitting the required documents and I have received no update whatsoever even after making numerous calls to them and they promised an update within 48 hours. I have never received such poor and unfair treatment in my life!