Cant get any of the free skins [EUW]

I've tried to get all of them, altho i cant redeem any of the codes

Is there any way i can either ask supp for the skins or some admin from the forums give me them?

LaxOvO - EUW

EDIT: These are Dreadknight Garen, Riotgirl Tristana and Unchained Alistar