Subway complaint: Would not honor a coupon on the receipt I got when I purchased a sandwich the week before

My complaint:

I received a 5.00 foot long coupon when I purchase a sandwich. When I tried to use the coupon I was told they did not participate in the coupon…I received to coupon from that subway!!! I feel that is false advertising and either they should honor the coupon that they gave me or maybe use different receipt paper.

Suggested solution:

Honor the coupon they gave me!!