Leading by example helps - documenting everything you work on and presenting overviews to the group when possible. Changes to on-call can help too. "If your stuff isn't documented, I'm going to call you instead of troubleshooting on my own."
For further actions, you may consider blocking this person and/or reporting abuse
We're a place where coders share, stay up-to-date and grow their careers.
Leading by example helps - documenting everything you work on and presenting overviews to the group when possible. Changes to on-call can help too. "If your stuff isn't documented, I'm going to call you instead of troubleshooting on my own."