FNB bad application

I have 2 bussiness bank accounts and a personal bank account, my problem is that I always have problems using the fnb app, I can never log in. Ever time the fix it for me at the bank then when I get to the office and try logging in I can't. This is frustrating and I'm very ****ed for this app have been a problem for as long as I have these accounts. On a nother note they also robbing me with bank charges as they take money twice a month and it always ad up to R1000 or more. I had enough and closing these accounts. The worse bank ever