False Information

I've been a Telkom mobile client for over four years and I recently went to open a contract using my Telkom Mobile prepaid number on the 03/03/2016 to be specific. I was assisted by a consultant (LM0) who advised that I needed a new sim card/number because I cannot convert my existing Telkom mobile prepaid number to contract, that I can only do if I am porting a Vodacom, MTN or Cell C number. I spoke to several call centre agent who advised me that it is possible for me to use my existing prepaid number as contract but the guys at the store need to do this for me. I am not happy because I felt that I was **** to by the consultants at the store. I eventually took a contract with a new number which I am not happy with because I want to continue using my old number. Can someone tell me what the correct information is? And fix all this.