Seasonal event rewards not being given to player after completing such tasks.

I was playing yesterday with my buddy in the new Seasonal championships that required the use of Rally Monster type vehicles and Super Saloons (Snow Monsters, Slippin Sliding Saloons, respectively) and all of my settings were correct and i had come in 1st place to earn the rewards (the cash, wheelspin and superwheelspin) for both of the championships. I repeated the events multiple times to see if the bug would fix itself but it never did. Is there a known solution to the problem?