It takes time. Be patient. If I remember correctly, Rewards start from rank 1 and go down. The process takes anywhere from 2-4 hours.
I don't know which events you've been doing, but it's taken me longer than an hour to get my rewards just about every event. Just be patient.
Go and take a walk or something get out of your mums house leave your phone there I bet when you get back the rewards are out.