Terrible service

I have received terrible service from Vodacom. Every single person is passing the buck, putting me through to a different department, even to a middleman company that the Vodashop consultants have never heard of. I was due for an upgrade and went through the entire process. After many failed delivery attempts the order was apparently cancelled on their side. With every call there is a different excuse for not being able to fulfill my order, out of stock, wrong delivery address, awaiting cancellation of previous order etc. I am in desperate need, searching for a single person that can provide a service for which we pay a substantial amount each month.