Vodacom online no porting allowed

Please be aware of Vodacom online, you agree to a new contract but want to port your number and they don't allow it. All because Vodacom don't have any tab on their website or no feature that allows the customer to state port my number. Vodacom should clearly state that existing prepaid numbers cannot be ported from the out set now we have to cancel the deal and lost out with other networks on their deals because of specials being over. Ref number for the deal: ***4