Don't waste your time!

All I wanted to do is change my cellphone number on my Blue Bean Credit Card. I phoned the customer care line when I got the response that they can't change it I have to into a branch. After standing 30 minutes in a queue for a 2 min request, I completely lost all interest in Standard Bank. I'm very unhappy and I would like to know why you don't have the most simple function as changing a cellphone number at customer services?? I have an account with FNB and I never worry about any of these type of things, because you can change whatever you like online, on the mobile app and with customer services. Get with modern times Standard Bank!!