Hello @NThomas A Warm Welcome to our friendly King Community
I am very sorry to hear about the issue with the Holiday Event reward!! There were few more players who have complained about the same issue in last couple of days!! I have already escalated this issue to the Friends Community In-charge... I am collecting this below info to send it over....
Can you please post the details of... 1) your game user ID number -- this link will help you ---> "Find Game ID Number" 2) Device you are using 3) Version you have