Okay, I just called again, and this time I talked to another lady who speaks better English. She told me they can only give me a refund after the order is shipped, not when it's processed.
I just think it's odd. I told her, I can let them ship my order, and order the same thing online with my coupon, and have them ship again. But return my first order.
But... This will cost TARGET'S money, not mine. Then she offered to adjust the amount AFTER items are shipped.
Well, maybe I was too considerate. I will call again when items are shipped, and update here.