Doubt it's a single chargeback that did that, though it's probably what got there attention to your account. Probably something else (A bad infosec tool copy/modification to search for something like SS# patterns). Even from a security point of view I would see your email and add points for suspected fraud. What do you think and employer would think to if they saw an email like that (Minor drug reference @ omg.lol)?…
GitHub isn’t his employer, what are you talking about?