Can I extend expiration of Reward coupon?

The response Reward coupon provided by Moaform has a expiration of 30 days(Starbucks) or 5 years(Cultureland) including the purchase date, and the expiration cannot be extended. Please note that this coupon must be used within 30 days(Starbucks) or 5 years(Cultureland), and the coupon cannot be used at the end of the period.

Reward coupons can only be used at designated locations in Korea.