You must have a valid Link membership and the FairPrice app in order to redeem rewards with your Linkpoints. Not a Link member yet? Sign up for free via the FairPrice app!
Here's how: tap on the profile icon on the top-left of the screen, then tap on the 'Log in or Sign up' button.
You must also have sufficient Linkpoints in order to redeem rewards. The number of Linkpoints required will be shown on the reward details page.