Stars not rewarded

Yesterday I completed riddle #10 of the sphinx challenge on college football 25. Upon completing the challenge I never received the star to show i completed the challenge and I receive an error message everytime I try to play the challenge again. Yesterday I opened a case and they told me to wait 24 hours. I have waited 24 hours and still received no reward. I am frustrated because I very similar situation earlier this year is why I stopped playing ultimate team and quit playing college football altogether. How can I receive credit for the challenge that completed yesterday?