Error getting free alistar and free tristana

I just create an account on youtube to get free alistar and an account on facebook to get free tristana.

• Alistar Error:

I already subscribed but everytime I try to generate the code it appears:

Then I click in that button and appears:

And keeps doing that...

• Tristana Error:

I already liked LoL facebook page and after I click on my server:

Appears this message:

Problem:

What can I do to get them? I got free garen without problems, why do I have problems now?