Account on hold for 4 years without correspondence

After 4 years of my account being frozen. I finally found out that Fnb ***** department decided to freeze my business account in August 2015. My question is how do you freeze an account business account mind you without contacting the business? I only realized that the account was frozen when debit orders did not go through. If i was to go to a bank and tell them that I paid a huge retailer such as Checkers so much and they didn't refund me are you just going to freeze their account without contacting them to see what steps were taken to resolve the issue with the customer. I went to the branch, no feedback. I called the ***** department but I hold for more than 20 minutes. Lastly I have been emailing FNB business care and still no assistance. I emailed them weekly . Why is your feedback to clients to poor? Please unfreeze my money so I can take my business where it is welcomed.