No sms

I don't receive notifications after withdrawal and making payments I called, I chatted with an agent Smangele on the app she was helpful after an hour I made payments still did not receive SMS I am very frustrated because it's very risky I called the call center they told me my number is not updated on their side I must go to the branch, why on the app it's updated and not on the branch? As I have paid people I want to have proof in SMS that I paid