Here's my "guess", based on John's "limited info", and his "timely" post about calling the guy question.
John calls him, and has a friendly conversation with the owner, and the owner knows nothing about what happened. All he knpows is the tech was sent out, and the tech made it back.
Owner has a talk to tech, finds out the whole story, and contatcs the customer with an appology, and credits his bill for the messup and inconvinence.
John gets a Kudos from both the other owner and the man he helped out, and the plumber.
But there is a reason John is keeping us "hanging" in suspence....
I hope he tells us.