false contract selling

one of vodacom agents Rewardsco called me last week on the 23rd on behalf of Vodacom to say Vodacom is reviewing existing contracts to see if customers are getting value for their money, they had all details of my existing contracts & said Vodacom is providing additional 10GB data since one of my existing contract is giving me 1GB at R309, I asked the consultant if this is a new line on new 24M contract & they confirmed its not new contract but additional sim which will end data subscription on end of main contract being supplemented, consultant indicated that they provide additional SIM so that they do not interfere with my current sim when i asked as to why additional data is not loaded on the current sim, call was recorded as per consultant said incase we need to verify authenticity of what was discussed. to my surprise what is sold to me is a completely new 24m contract which will end on 27/07/2024 while it started on 2021 july, i did not agree to a new data contract because i already have a data contract, i want the contract canceled i am still within 7 days of contract start date, my phone is blocked from getting through to cancel, if i get through for some reason consultant drop the call in the middle of conversation. please contact me on *** to cancel, contract/account number I***