Bad service

Went to the bank(Blu Valley) to change my number today and that was done. Got back to work to do my transactions and it says that I’m not registered for USSD. That’s a surprise as I did have ussd before I changed my number. Called the call centre, they can’t help and now I need to go to the branch again. I don’t know what the call centre or the branch is for, if they can’t help with my query. Now I can’t pay people because I need to go to the branch again and I really don't have time to go there again.