Cancelation of a new contract and to revert to my old contract.

I've had a smartplan 100 with a multi sim added to it for about 4 years . My contract was due for a upgrade so I went to a Telekom store to get it done. The agent at the store said that I'll be getting the exact same type of contract with a multi sim,only now its a freeme contract. She did the contract and changed my multi sim to prepaid ,when I didn't even ask for it. She handed over a new phone ,then said that she wouldn't be able to connect my multi sim,but she'll still enquire, so I took the new phone and left,5to8 minutes later, she calls me and say's that I must come and hand in the new phone since there isn't a multi sim available on that type of plan. I handed over the phone and told the agent to cancel the new contract and revert to my old contract, since I still had 2months remaining on it. She said that she had emailed to get the new contract canceled. She gave me a case number and said that it will be sorted out within 21 working days. I've been to the shop a couple of times and also called the call centre on the progress, they said someone will be calling me within the 21days. No ones called as yet and I'm also paying extra for a phone that I don't have. Some of the agents at the shop should be more knowledgeable about the products that they are selling. I'm still waiting for a call from Telkom.