Vodacom shocking service when cancelling

I have three contracts all on one bill. We are emigrating in two weeks. The first one: ended July 2021; phoned to change to "pay as you go" and I was called three times about it - worried as have had nothing in writing. The second one: contract expires October 2021. I want to pay up and change to "pay as you go". Impossible!! 45 minutes on the phone yesterday. No email today. They can't find the info. Got call today from "backend" dept and they have no idea why it was passed onto them!!! The third one: owe too much so will have to pay until Feb 2023!! Overall opinion: shocking service. I have been a customer for over 20 years. So easy to get a contract, but not to cancel!!!! Can't go in to shop as they say I have to phone Vodacom and yet I can easily ooen a contract in a shop!!