useless bankers on the useless mobile app

Ever since banking with FNB, I could while doing my online banking, increase my limit to make my monthly payments. This month, I cannot. The error message states, chat to the agent via the app on the phone. I do this. This entire attemp took 4 hours. In 4 hours, I have spoken to 4 FNB banks who were utterly useless. #1 listened and escalated the chat which then downgraded itself. Back in the que, Agent #2 could go back read the history of the chat and escalated the issue. It was downgraded again. Agent #3 was most useless, he said hello and left. Agent #4 was in a hurry to home, all of a sudden he cannot read the history. So I am left at the point where i cannot make the transaction I need to, with absolute no assistance from FNB. Thank you for absolutely ****** nothing.