Ono Hawaiian BBQ at 17416 Colima Road B, Rowland Heights, California.

Spam musubi is my fav

It pains me to give a 1 star review, as hawaiian places are few and far between in our area. but...this place sucks.
we came here with the entertainment coupon. it is a valid coupon, from a book that i BOUGHT. yes, i paid for coupons. when we got there, they chose not to honor the coupon. the coupon was for $6 a food purchase (and our purchase was over $18)--so you would rather lose a sale rather than give a $6 coupon?
in fact, the food was already done (that's how long the cashier was fumbling with the coupon)--so they ended up throwing out the food since we wouldn't pay full price.
tell me, am I unreasonable if I come to the establishment, and follow the rules of the coupon to the letter, but they refuse to honor? there was no special substitutions here.
bad bad customer service