I have really personal information and want it to be removed.
Is there any email I can contact instantaneously? It's really urgent.

5 days later

Then why did you voluntarily publish it in the first place? It's not like Reddit requires you to disclose your real identity.
If you choose to publish something to a clearnet website, you may or may not be able to simply "unsay" it. People should finally learn to think before posting, and not expect the world to bow down to their "please forget what I said" request.