Ranked Win doesn't count after skipping stats
So my last game as Tristana my team won and, after destroying their nexus, the stats didn't appear. Me and my premade had to click "Skip waiting for stats" and apparently I didn't get my promo victory, and my mate didn't get any LP.
EDIT: Oops.. apparently after 30 minutes, I got credits for the win :) Just leaving it here for the people that have this in the future