False/********** advertising

Bought some cheese at Food *****s Market in Mossel Bay. Was marked on shelf as R69. No R69/kg, just R69. Whe they rang it up it came to R93 odd rand. Casier showed me the full price printed on bottom of cheese. Is this not false/********** advertising? Everywhere else the shelf price is indicated as R/100g or R/kg. Spoke to manager Bernard Claasen about it but they are adamant that they are not in the wrong. What happened to the price shown is the price paid?