Deplorable actions by Standard Bank.

I'm disappointed to say the least with the actions of Standard bank. The bank took money out of my business account without permission or atleast a heads up. I run a small business and this has really put me out. I wonder what remedies I can persue as they have proven that the smaller your business is the more inconsequential you are to Standard bank. They even had the audacity to charge me more fees for an error made by them. I have tried to take this up with the bank but it has unfortunately fallen on deaf ears.