Incorrect information given for contract

I have been with Vodacom for 18 years and have generally have good experiences. I had my phone ****** and went to Vodacom to get a new contract so that I could get new phone. Since I buy extra airtime every month anyway for data this seemed like a great solution since the consultant said I could send airtime from the new contract to the old. I cannot do this so the contract is useless to me since I need my regular number sim card in my phone. I have asked multiple times and they say there is nothing they can do I must pay for this contract I cannot use. They cannot combine the two and the cancellation fee is over R5000. I still need to buy additional data on top of this because I can't use the new contract easily. I went into a store, they said they couldn't help and Vodacom customer care says there is nothing they can do and no one else I can speak to. Please help me put the money I spend here to good use.