If you choose to change the product with a same value, then no point will be diminished.
2.      If you choose to return the product, the point that you’ve earned before will be diminished from your account and you will receive cash money from your product return.
3.      If you want to return the product and your point isn’t enough to be diminished, you can only change a product with the same value.
4.      If you want to return the product that you redeemed before with full or some points, you can only change with the product which has the same value because the points that have been redeemed cannot be transferred back.