Worst Bank Ever

So they just go ahead and freeze my account no reason given I had to find out embarrassed at the fuel pump because my card was declined. When you contact them they said it's because of outstanding paperwork at the bank? WHAT how can you freeze my account in the middle of the month because of outstanding paper work. I had no communication or any message or phone call requesting paperwork that was outstanding but you feel you can just freeze my account. I opened an account at Standard bank beginning of the year and I must say worst experience ever. I will surely close my bank account with them, they take your banking fees every month but won't allow you access to your own money because of paperwork your not even aware off!!!!