Vodacom and their scheme

In March 2022 I upgraded with Vodacom's 2 phones for 1 deal - I never requested an additional number but 1 was sent and assigned to my account - when queried, Vodacom advised that I wouldn't be charged for said number, the contract should be expiring soon (3months left) and now for May my billing had jumped when I went online to check my billing I saw that Vodacom is now charging me for a number I HAVE NEVER USED.. The package was never opened or Rica'd. I called Vodacom on the 13/05 once I had been through my billing to find out why and they couldnt give me feedback and no one called back - I called today again 20/05 only to be told that Vodacom deleted the promotional discount and therefore I am liable to pay for this number!!! My point is I NEVER REQUESTED THIS NUMBER, I WAS NEVER CHARGED FOR THIS NUMBER AS I HAVE NEVER USED THIS NUMBER & YET I MUST NOW PAY FOR THIS NUMBER!!!! I have been with Vodacom since 2005 and lately have been unhappy with their network. Looking at canceling all numbers and moving over to a new network