Upgrading contract without my consent

I had a complain about vodacom, on the 18th of September 2024 I called vodacom telling them that one of their consultants called me asking me that if I was aware that my contract is ending on the 29th of November 2024 and I told him that I was aware but I am not going to upgrade my contract. So the consultant said to me it's okay but vodacom is going to give me a free speaker for being a loyal customer after ending the call it didn't sit well with me so I decided to go to a vodacom shop the following day to ask about this free speaker thing and the lady who assisted me said the is nothing like that and she advised me to call vodacom customer care to ask about this free speaker promo I did what the lady adviced me to do and called vodacom after explaining to one of vodacom consultant about what transpired he said he will escalate the matter so they never got back to me I kept calling vodacom they took me from pillar to post until I decided to write to hellopeter. I got help from hellopeter because after writing to you vodacom called and they said they will sort the matter out... To my surprise I phoned vodacom today to check if they have fixed everything and I was told by one of their consultant that on his system it shows that I have upgraded my contract on the 30th of September 2024 and my contract is ending September 2026. Please help me hellopeter to solve this matter with vodacom one and for all