Your credits are considered a promotion so if the site offers 30% off to vip members, you can't use your credits to purchase it- you must pay full price in order to use your credits and even the price for clearance items will go up once placed in your cart
Hello Xia,
We appreciate you bringing this to our attention and we sincerely apologize for any inconvenience you had with your order. We value you as a member and want to make things right! A representative from our Member Services Team will email you within 48 hours.
Best,
Ivy