Fnb worst bank ever

after being an Rmb private client and having two business accounts with FNB I am considering moving to another bank. I spent 2.5 hrs of my life at the Sandton branch trying to allow my new business partners access to my online banking and change the mandate to my business account. To my surprise the next day my online banking access to my account was deleted and my card was cancelled. No one has been given access to the business account and my money is now sitting in an FNB account in cyber space without any access to the rightful owner of the account. After calling FNB Sandton many times to sort it out nothing has happened. I am now sitting in the branch one hour later waiting for someone to help me. I can not believe this is a bank where they help themselves to your money in their account and Delete all the ways you can actually access your own money. I am beyond frustrated and at this stage have no hope of anyone in this useless institution being able to help me.