Do pass food store customers using coupons have to accept a disadvantage in the order?

A few days ago, I used the 20,000 won worth of points accumulated over five months on Cashdoc to issue a coupon and went to L Pass Food.

It was a 0-year-old pack product, and it was raining quite a bit that day.

 

It was lunchtime and there weren't many people. While waiting to use the kiosk inside the store, the person in front of me was chatting on their phone and repeatedly made mistakes while operating it. About ten minutes passed.

My turn came, and I was proceeding skillfully, but I couldn't enter the coupon number.

 

"Ah, what is this?" I re-entered about twice, then told the next person to go ahead to avoid causing inconvenience, and waited for my turn again. But as expected, it didn't work. When I checked, I found that among the kiosk devices, some displays show that they are available, but in reality, the devices are not functioning.

This has also been confirmed as an actual function of the relevant device.

 

Eventually, I had to place my order face-to-face with the store's service staff.

 

The kiosk wasn't working, so I placed the order, but I was told I have to wait more than 30 minutes for the coupon.

ㅋㅋㅋㅋㅋㅋ It was ridiculous.

 

Since then, customers have been lining up at the store, and I had to process their orders as well, so I waited for almost an hour.

 

Ah... my lunch break ㅜㅜ ;;;;

For your reference, my lunch break is 1 hour and an additional 30 minutes, totaling 1 hour and 30 minutes, in a workplace culture that allows for that.

 

When the topic of coupons comes up, there are cases where it is handled awkwardly during this process, and similar real-life experiences have been posted on online communities, becoming a matter of public discussion.

 

How can designers ensure smooth communication to resolve issues for coupon users?