Vodacom fooling people

Vodastore on the my vodacom app is the worse, I added items that are on promotion on my cart and when I tried to checkout just as I filled delivery details when I tried to continue to the next step it continuously gave an error that requested quantity was unavailable. It didn't even take me 3 min or less to checkout after I added items to my cart. I honestly think vodacom is messing with us, when you are about to check out there's a message that items on your cart will not be reserved unless payment is made but as you are about to make a payment you'll find out that all your items are gone. I think they should ask other online stores like superbalist on how to give good customer service. When you shop at superbalist it shows you how much time you have before promotional items are removed from your cart. With vodacom you add an item a minute or 2 later that item is removed. I doubt if there's anyone that successfully purchased an item on my vodacom app