Capitec bank says NOTHING they can do.

I stopped receiving sms's notifications for money in / out of my account. I went to the branch in May 2021, the consultant tried to delete my app, re-install 5 times, delete my cell phone and verify it again, but no notifications. I was told is my network service provider and my android phone. I tried to resolve the issue telephonically, Whatsapp, FB but no solution. I bought another phone, change my network from mtn to Voda, now they change the story saying it's in app. It doesn't give an option so even telephonically call center can't assist. I want told NOTHING WE CAN DO!!!!! I'm just fearing the worst scenario like if something can happen n not receiving notifications?