Worst Service Ever !!!

So I changed my phone number recently and discovered that I no longer receive sms notifications when there is activity on my account. I called in and asked for them to change my cell number on the system , I was then told to go into the bank to do this as it cannot be done via a call centre. I looked at other banks apps and you are able to change your cell number within the app.(but not standard bank , they are really special) I am really frustrated with this situation as I wont stand in a line for an hour or more on saturdays when Im able to go to a bank the lines are standing out of the bank. This is really pathetic as I have been with them since 2005 and this is the level of service they give me... I cannot do once off payments via my app because the OTP is sent to a number that no longer exists and the bank really thinks I have the time to stand in a line for an hour or longer just because they dont have staff in thier banks. I will not stand in that line , Im at the point where I feel like opening an account with another bank where everything works from the app to the staff

The service cannot be rated or criticized as they do not want to work