Deep breathing and calm persistence.
I usually smile a lot and sometimes, joke around in good humor. This approach often spurs others to help out as efficiently as possible and/or to "go the distance" on my behalf if there is a challenging situation.

We are each/all only human.
We each/all hope to be treated well (with respect) by others we encounter. The same goes for customer service reps, etc.

Lots of very frustrating events take place; yet,I get more bees with honey than with vinegar. (More assistance, too.)


WC