Music Festival rewards. I collect all the blue saxophones but didn't get my reward?

i went to CC All help and the members there were saying to click on the icon on the map page to collect my reward. I had no icon on the map page or in the events tab. Why didn't I get the prize for collecting all the blue saxophones? Please don't tell me that challenges come and go etc etc etc. it's not fair other people get the prize and I don't.