Playstation 4 Ripp Off

Bought a Playstation 4 bundle at Musica on 11 December 2015 for R6999. See it went on sale at R5999 on the 14 December. Why did the sale sale staff not inform me of the price drop? Very unhappy that I was cheated out of R1000. Contacted their customer line who said ster kinecor dropped the price and that they were unaware. I still down R1000.