We made a coupon service system, accidentally took the wrong ticket, sent it to take a new one, and as a result, we waited in line for five people. Why not just serve?What is the priority service for those who take coupons later? That earlier there were just queues , they served all their friends in front of them , that there were coupons , there was no sense .They also talk to the staff as if they came to their house, not to the post office .