OTP incorrect number

I have been trying to log into my FNB banking app but it says I have attempted to enter a password 3 times that was incorrect and now I am blocked! Firstly I was setting up a new phone and my CORRECT password kept saying incorrect which it is not. Secondly it sends an OTP to a number I haven't used in 3 years and I have changed my number with FNB yet the OTP goes to a different number which baffles my mind as ALL my messages and calls from FNB come to the correct number so how is this possible??????? Now it says I need to go into a branch to change my number but I have done so 3 years ago and I am not able to get to ANY FNB branch for the next 3 weeks as I'm not close to one. Now I have money coming in and I won't be able to access or transfer it. How is this possible FNB!?!?!?!?!?!?!?!?!?!?!?!?!? Please fix my number immediately as I refuse to do so any further as it has been done 3 years ago and yet you felt it was okay to change it back to an old number. Your customer service is astonishing and I am hating FNB more and more every day.