Sim card activation

I received my new samsung galaxy s6 friday 5/06/2015 on a new contract.I called vodacom after sales to have them activate the new nano sim card with my prepaid number.I was told the activation will take place after 5 hours and on my old phone I will loose network and the activation will take place, until today 07/06/2015 that hasnt happened..Saturday 06/06/2015 I contact them on their online chat again to ask about this, a consultant told me to call after sales and I explained to the consultant I already have and nothing has happened to my new phone.She then told me the activation will take place on Monday 08/06/2015.I do not understand how 5 hours turned into 72 hours now.