Commonlabs Vit E calming ampoule Giveaway put of stock in shopee

Hello fellow skincare junkies! I just received an email from Picky with instructions on how to check out the products, I was supposed to check out 2 products but unfortunately the other product is already soldout in the website so my question is , will i still be able to check it out or its a first come first serve basis? And how will i inform picky that I will not be able to submit the review due to item being OOS? Thank you in advance