Vodacom Online

I purchased a phone via Vodacom online. I received my phone without a problem. The phone I took out needed a Nano Sim card and so I called vodacom after sales call centre. The lady took the new (Nano) Sim number and said it will be activated between 2 to 24 hours. Since then I called Vodacom no less then 7 times over a period of more then a week for the same problem and have had to repeat the same process of giving the new Sim number and answer security questions (spending more then 20 mins on each call and still have no response or reason as to why the new Sim is still not activated!! ... every agent says sorry for the last agent not calling back and then does the exact same thing! Please have my Sim activated or cancel my contract and pick up the phone ! ... It's useless having a phone and not being able to use it at all.