How do you deal with rude users?

I work for a large company in which I wear many data related hats. One of my roles is to develop access database front ends as a way of managing data entry and providing data calls. I have recently been tasked with updating an old database to a version 2, while also providing support for the old version.

A user of the old version called me today and informed me something was broken, and that I needed to fix it …

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