Lack of communication

I would like to lodge a complaint, I have FNB account that is currently on minus R3k if am not mistaken. ever since lock down i. lost my job and am not working i went to the FNB branch to tell them that the bank charges on this account are extremely high and I won't afford to have such negative on my account. i am starting on a new job next month but am afraid that all of my salary will go straight and replace that negative, am thinking of changing banks but i love FNB so and so disappointed that nothing have been done with this high negative amount.