Sim swap issue

I'm so disappointed with vodacom I wanted 2 make a sim swap so as told I went to a vodacom shop to buy a sim card when I called vodacom the following day to activate the Sim card to my old number they tell me I should have used the sim card with in 24 hours of purchase so I need to go back to the shop and buy a new one why was I not told that I have to use it within 24 hours den I would have made time in my busy day to sit and wait on the phone I'm very disappointed and I don't think it's worth me going back to the shop and buying a new Sim just to hold on and wait to speak to a consultant for over 30 minutes and not get what I need