Vodacom unable to fix their own mistakes

We recently returned from working overseas after 2 years. We stopped and canceled our Vodacom accounts before we left. Wanting to start a Vodacom contract again did were we informed our shock that our accounts were with legal department for some reason. We had a huge fight with Vodacom in 2021 after they converted our contract to prepaid after we explicitly asked the accounts to be stopped. Vodacom in the end refunded us both and said they closed our accounts, , which is not the case. We phoned legal yesterday and they confirmed with accounts also that it is a mistake from Vodacom's side and that everything is cleared and we can open new contracts after an hour or so and that everything is in the clear. Given Vodacom 24 hours did we return to the store and to our disbelief were we still with legal and could we not open new contracts. They are costing us time and money now. What must a person do to be treated with a level of respect and competence by Vodacom? It is really ridiculous that a multi-billion rand company cannot do something as easy as fixing their own mistakes. What a pathetic way to be welcomed back. Wish they could learn from Vodafone overseas how to work with the people that make them rich a.k.a their clients!