Day Light *******

I bought popcorn at clicks that were on promotion 4 packets for R45. 00 and at a later stage after I left the store I realised that I fit charged each packet on a normal price. I went back to the store and the manager told me that I shouldn't have taken different flavours for the promotion to be applicable, however it is not stated on the promotion flasher that a promotion is applicable only when you buy the same flavour. The amount I got charged is R 66 instead of R45. This is a total *******.