Vodacom contract caller ID ****

I just took a contract with Vodacom and when I unpacked and activated my new phone When receiving calls I cannot see caller ID. When I enquire I was told I have to pay an extra R10 a month for the duration of my contract to activate caller ID. I am not happy with this because Prepaid customers dont have to pay for this service and the vodacom consultant said it is for me to be able to get itemised billing which will not be free if I were to request it. I must say that this is a *******. Why pay for something when I am a commiting customer unlike prepaid customers?