Why are you ruining my life? Ref number: EC-1KJ2-2FJRY1

I lodged a query on the 18/06/2018 with Vodacom after they sold a wifi rooter to my sister under my account. I was told that I need to speak to the rewards company as they did the sale and that company told me that they confirmed my date of birth with the person they spoke to hence they couldn't tell it was not me and this is after Vodacom confirmed that the sale was not done correctly. on the 02 of July I was told I need to lodge a ***** dispute and after I received the reference number ( EC-1KJ2-2FJRY1) I was told I will get feedback in 14 working days and to date there is still nothing. I have called, followed up on facebook, send numerous emails and no luck but Vodacom still keeps on billing me. Yesterday they send me a bill of R800 for something that was not sold to me!!!! and they are going out of their way to ruin my life and credit record.