Handed over without any notification from the bank

due to covid our business took a knock and was not operational for months. we did also not use our FNB business bank account. We don't have debit orders, so it was just the R150 bank charges that were deducted each month. and at some point the bank account ran out of money. But instead of phoning us, sending us a message or email, they have turned us over to attorneys. I don't know where Im going to get the money for this now, over R700??? Why could they not let us know??? I would also like to close my account now, I don't feel we were treated fairly.