Bad result

Just got my final exam result several days ago. I get 2.29 only for my CGPA. That's not the worst of all, the worst is I got 'F' for my Mass Comm! WTH!! How is it possible??? My coursework marks isn't very low~ Besides, I answered all questions in the exam paper. At least I'll get 'D' worst to worst. But how come a 'F'???? =.= Now I got 2options left after consulting the staffs. Appeal for recheck or redo the exam paper. Haiiizzzzz~~