Standard Bank changed my cell phone number via a system glitch on their side

I got an sms about a month ago saying my cell phone number has changed on my profile, but I ignored it cause I thought it might be an invalid sms. Yesterday I was paying with my card online and got notified that my cell phone number is not the same as what the bank has. I called Std Bank card division, consultant advised me it was a system glitch on their side and will request the I.T. department to fix. When I called today to follow up, as I need to do the transaction urgently since yesterday, the consultant said the I.T. department is still getting to it and I must go into a branch to update my details as well. It is just frustrating cause I am busy and now need to find time to go to the branch and make changes for something that the bank messed up in the first place. Really need to get with the times Standard Bank.