['So, the other day I had a test of my character.', 'What happened/', 'I had ordered some medicine for my dogs.  When I arrived home, I realized that I had paid for a two part kit, but they had given me a four part kit.']
Well, I hope you did the right thing and correct their mistake.
The other day I went to make a purchase for some new flea & tick medication for my dogs.  We I arrived home, I realized that the employee had given me a larger supply of medicine than what I had actually ordered and paid.  By the time I had returned home, the store had closed.  I had to wait until the next morning to correct the matter, but I did go back to make the matter right.  It is important to me to be honest and trustworthy.  Not only this, but my son saw this display; and, thereby, I am teaching him to be both honest and trustworthy too.