Bad attitude

Went to Pick n Pay Princess Crossing and saw they had 6x200g Lays for R100. They however did not have Carribian flavour. Is asked if i can take 4 other flavours and then pay for 6 and collect the other 2 later. They refused. Went to get a rain check. The lady said i can take other flavours as it is advertised as various. I told her i wanted 2 carribian as well but they do not have. She simply turned around and walked away. I was so upset. This is unprofessional conduct from Pick n Pay staff. Left without.