Misleading clients to make sales

Vodacom called to upgrade my package from 10gb to 150gb for more or less the same price, I accepted the offer because it made sense. I asked them if this upgrade will affect my phone line because the number I used is my main number, they said it would not. To my surprise on the day the new contract commenced, my line is not working, when I call to find out what’s wrong, they tell me that the contract is a home WiFi and they disabled my phone line. I asked them to cancel the order, they tell me that it will take up to 13 working days to get my line working and there is nothing they can do about it. I am expecting important calls on this line, this is unacceptable services from Vodacom. I will definitely be changing networks.