Incorrect adverti*****t.

I was in Pick 'n Pay - Uitenhage branch at 13:20 on 24.11.15. As a pensioner I had to buy nappies for my grand child. As a special, 58 Pampers (nappies) No 5 were advertised for R167.90. When I took the two containers they only contained 52 nappies each - 12 short in total. It further advertised that the No 5 nappies cost R2.89 each. In reality it now cost R3.23. When asking about it, one of the staff said that the Pampers manufacturers changed the number of nappies per container. Surely Pick 'n Pay should know in advance of such changes for their adverti*****ts.