Vodacom is a *****! *******ly setting up a service without my consent and taking advantage of the elderly

Absolutely disgusted in a recent tactic used by Vodacom sales person in Yzefontein. My 68 year old father in law just questioned the sales person about the offers they have, the sales person asked if he had an vodafone account and he said yes. That is all, next day they received a router at the house, with nothing being signed. We have already had an agreement with another provider who was busy getting things done for us, turns out without anything legally being signed Vodacome had a line up and running. We called and they told us this should of never happened and will be sorted in 3 days as we need it off for our new line to be active.. 3 days later Absolutely nothing has happened, we called up and then we get told sorry nothing has been done with your request and it will take a month. So please explain to me why we need to be penalised for something that was done what I think is *******, I mean how do you set something up without having it signed and agreed by the customer. This is *****!