Out of stock, rudiculous

Cadbury were advertising an Easter egg filled with astro's. Yesterday, I went to 4 different Pick 'n Pay's in the Kempton Park area, & not 1 of these stores had any of these eggs. The last 1 I visited at Glen Balad Shopping Centre, were very rude to me, & told me they were all sold out. How can you advertise something like this for Easter, yet you do not have enough stock available??? Disgusting, & pathetic.