Increase cost of contract without my permission

I upgraded my contract last year and had it transferred to my name (it was on my father's company's name). I opted for the Red VIP contract, which, without a phone, costs me around R1200 a month. I received an email today from Vodacom, citing a quotation that I apparently requested. I requested no quotation. However the amount of the quotation (R1799) is showing up as the amount I owe on the Vodacom app. Can someone please tell me what is going on?? I did not agree to this.