Vague Rules and terms and Conditions changed

I was told by a Vodacom consultant last week that if I convert my current Vodacom contract (which has finished) to a prepaid type, that if I ever want to go back onto a contract that I will not be able to keep my same cell number. This is new, and annoying. Please confirm if this is correct

Also I am told if I do renew my contract for a sim only contract, that I wlll be able to upgrade this contract at anytime during the contract period to one that includes a handset.

Please confirm that these are correct and where can I find these rules in your terms and conditions, as I have looked everywhere without success