Pnp head office

Pnp staff is paying for liquor at R20 for a 6 pack when I emailed head office about it head office is saying that it's staff discount but on the 6 pack of liquor is a reduce label for R20 like what so all pnp staff is paying R20 for a 6 pack of beer or ciders???? Then head office is sending back it's staff discount really R20????