FNB has useless support

I cancelled a debit order with FNB in November last year. I just noticed that since January they started debiting me again. So today i went to my banking app for help. I used the chat service in my banking app. I was passed to 4 different people. The last person I dealt with Phindile told me my bank account does not exist. I say, "I am looking at the account number in my banking app. It is correct." How can they tell me my account does not exist? So after 45 mins on the chat app, I achieved nothing, and apparently my business bank account does not exist. Absolutely useless service. Useless staff and unhelpful chat service in the app. I now have to go to a bank for help. Your help service is the worst.