Upgrade without permission

Vodacom upgraded my contract without my consent, and the worst part is they upgraded it to home internet, after numerous phone calls they said it will be rectified but it will only be from the 1st of May, what a inconvenience, I cant receive any phone calls, only whatsapp if I'm connected to wifi and then I'm stuck with my internet banking as I need to approve transactions via my phone. Why should I wait for a whole month so that Vodacom can fix my contract as it was their sales consultants who just went and upgraded my contract.