Contest entry for Canadian customers

Good morning and Happy New Year to everyone.

I live in rural Alberta, Canada and I tried to enter into the Rokuwinningwonderland contest and found that I could not. Unless I missed a step, all I could find for where you are located in the entry form was United States of America, States and zip codes. 

In Canada we use a postal code.

There was no way to get around it. Plus it's not proper to circumvent the system.

Does anyone no how I and other Canadian customers could enter the contests that Roku has?

I / we would greatly appreciate your help and insight.

Thank you in advance 

SnapfroznYank