Win Competition, pay too much for photos

I got a message that I won a free photoshoot. Since I like things too much I went to the studio with my friends who had to pay R100 each. The service was excellent and we took lots of pictures. The free photoshoot came with 3 digital photos. However, when we wanted the photos we realised we took more than 30 pictures and wanted all of them. But one picture is R120. The free photoshoot was just a marketing strategy for them to over charge us. Other studios offer packages for about R600 for 30 pictures or much less than that but Red n Black charges way too much...and it's only digital pictures.