False Promotion

Pick n Pay had a promotion where when you buy for more than R100 you get stickers when you have 50 you can go and claim after that you continue to another level which is 60 stickers that the last 50 plus new 10 stickers. we went to claim on Thursday (1/08/2019) our brochure had 60 stickers of which will make us get 2 bowls when we got to Maponya pick n pay we were told that we qualify for only one bowl we must start afresh again which is we must buy again and have 50 stickers this was surprising because no where in the leaflet it was stated that after 50 stickers we must start from number 1. I feel ****** by Pick n Pay because they didn't say anything about that and it doesn't make sense because if they have different bowls with different numbers, if I start again it will make me have the same bowl why do they have different bowls with different numbers