Vodacom is upgrading customer’s lines without authorization

Vodacom is doing upgrades on customers accounts without authorization. I started receiving sms about an upgrade waiting approval, then showing approval and my delivery will be handed over to courier. I had no I dead what this was so I called Vodacom, we spoke at length and I explained that I did not get an upgrade, and did not authorize an upgrade on my computer phone. After the calll customer care explained that this matter was handled. I then received another message telling me the order was delivered. I called Vodacom again, was directed to the *****s department, I called sent emails, they told me I needed to go to the police station, did all they asked, sent their forms to them, reference number: EC-291J-2CR27L. Then I got a message saying the case is closed, I asked how when I did not receive any details. I received a message this morning that I must pay an amount close to R1500 on my account. I called customer care this morning, they told me there ms nothing they can do, they told me to call ***** line on ***, I called twice there was no answer, I called the after sales department, they are telling me that I received the package and signed for it, there’s nothing they can do, the delivery was in Cape Town I stay in Johannesburg. No one is doing anything. No one knows what is going on, I don’t have r1500 to pay. No answers, no one has contacted me directly, I’m the one always calling, emailing. I am frustrated