Pathetic Service... (Or should I say - No Service)

Just when I thought my faith in Vodacom has been restored, they show me yet again how wrong I am in renewing my faith in them...

I have two lines with Vodacom. Line A is my cellphone contract which I use on the regular. This is my main line. Line B which is a data SIM with a router.

Line A = Happiness. Upgraded recently and working just fine. Line B = Unhappiness. Explained below.

When Line B was up for renewal I called in to cancel it because I no longer required it and the router + SIM was ******. The agent I spoke to cancelled my line but also told me about the 10GB contract which as around R250 p.m. I told them I was interested and they supposedly signed me up for the renewal which included a new router + SIM... A week or so passed and I received no delivery. I call in again and the agent I then spoke to told me they can't see the upgrade on my profile, just that the line was renewed. This was obviously wrong! I was also told a story that I wasn't reachable for the delivery (which is complete BS). After explaining my story to agent they then told me they would do the upgrade again etc. I will receive a call from the confirmation department (who's unreachable by the way). Weeks have passed and no confirmation call. I have been billed for the new contract and I have paid in good faith. I will not pay next month if I don't have any device... I've called in on numerous occasions and the feedback remains the same, the confirmations department will me. I have completely lost my patience. Surely this can't be called service??!?!!?!

Where do I stand as a customer? I'm being billed for a service that I haven't received!