You can redeem your rewards via the Rewards area in your Le Col account. Once you've reached the threshold for a reward discount - hit the redeem button.
Once you have activated your voucher, the points cannot be reinstated if you change your mind. Your points total will adjust accordingly and then you'll be able to continue earning points.
Once you've activated your voucher, you'll see a code in the following format which will need to be applied at checkout to receive your discount.
Discount Vouchers: These are single use discount vouchers that are unlocked when you have earned sufficient points and proactively chose to ‘redeem your points’ for that reward. These will have limited validity periods of 28 days from issue of the voucher and maximum discount values of which details will be communicated to you on receipt of the discount vouchers. Certain product exclusions may apply. These discounts cannot be used on orders containing Archive sale items and may not be combined with other promotions or discounts.