Smart Shopper card

Being a loyal customer, I recently downloaded the Pick ‘n Pay app on my phone. Amongst others, the app rewarded me with a “Personal Discount” stating “R20 off when you spend R100 or more”. I went to my nearest Pick ‘n Pay and even though I did not need to buy R100 worth of goods, I purchased more items so that I can get the R20 off. After waiting in a long que and paying for all the goods, the clerk informed me that the server is offline and that I couldn't receive the discount. How convenient. I am very disappointed that I ended up buying things I did not need! Don't think I will ever use the app again!