How to earn the certified badge when discobot never messaged me?

Continuing the discussion from How do I earn the certified badge?:

I know that people have been asking how to get the certified badge and have gotten this as a response, but I was never messaged by discobot. When I attempt to write a message to it, I am told that the message needs to be at least 30 characters.

Nevermind, just filled the message with a bunch of nonsense.