wanted to keep prepaid number on the new contract

Week ago, I went to a MTN store at East Gate mall to apply for an additional contract. It was approved, when I went to collect my tablet, I told the consultant that I have an existing prepaid number that I would prefer to use for this additional contract, he told me that this new contract is a data contract, so I wont be a able to make voice calls. Due to his lack of knowledge about that, I accepted the new number and then went on to investigate if really I won't be able to make voice call in this tablet. To my surprise I was told that I can make voice calls on the tablet, I then went back to the store, and that same consultant told me that I'm already late because this number has been activated. He says I must I wait until my contract expires! ! It was a misunderstanding, there's nothing he can do now....because of that I must carry 3 phones now.<br> <br> all I want is to use my prepaid number *** on this new contract<br>