So I do admin work for a government organisation. This guy from another organisation got in touch on Monday to request a document that they should have received a year ago, but it doesn't look like it was sent (as a side note I wasn't with the organisation then, it was a coworker that dropped the ball but I chose not to drop them in it)
By Tuesday midday I manage to find out it wasn't sent to him and send it over with an email written as I usually would. I then get an email from him saying that I should have also said sorry in the email to him and his team for the time they have spent trying to find this. I scan my email, I would typically always add an apologies to these emails but it slipped my mind.
I began replying to apologise when another email comes in from him. Same text as original email, but with people CC'd in this time and this text added
"I look forward to the apology"
I immediately deleted my email apologising. This was at the end of the day so I left work. I absolutely refuse to apologise to somebody who would write that. I can be quite stubborn. Was this a reasonable way to handle the situation?