Vodacom Sim swap

I have a contract with Vodacom for many years. I want to swap my sim card to an Esim. I went to the store with my sim card and my passport. A step in the proces is that someone other that the adviser in the shops phones my number and asks questions to check my identity. I answered all questions but they do not match the details they have their database. I suspect they made mistakes putting my details in long ago. There is no way I can check of alter those details. Today I had a second try and I was denied again. Tomorrow a third try. I'm frustrated. My passport and sim card are present but I can not swap. I will probably be denied tomorrow again. Thanks Vodacom to let down a loyal customer. MTN is actually close by. I might pay them a visit tomorrow.,