Absa Vaal Mall incompetence

I took off to go to the Bank and fix my Notify Me service which you can only fix at a branch. I got there and when they helped my i told them that i went overseas for a few weeks and when i came back one of my bank accounts i only received app notifications and not sms's anymore. I told them that i tried to just reselect sms notifications on the online app but it doesn't allow you to do that so i added another notify me which the system allows. Then i started getting two sms's for the same transaction which needs to be fixed at a branch. So i told them that they only needed to delete the extra notify me i created and fix the other. They told me that it is fixed and i believed them till i paid with my card again and got two sms's for the same transaction again. Please explain to me why that happens that the bank personal couldn't fix something that i explained as clear as possible what they have to do. Is that the competence of the employees at Absa?