Ok when did you first start trying to activate?..
Its been well published you can only activate the codes (WHILE THE TWITCH/YOUTUBE STREAM IS RUNNING)
OP should have been Clear on that.. The code is designed for players watching the stream. Its a bummer you missed it but thats how the event was designed
I will tag this to top of page to make sure its clear to all
to make sure players realize code is no longer valid as stream has stopped