Most Helpful Guy
It seems easier to just block him on all media. There's no point in telling him how you feel if he is incapable of seeing the harm he did you. He would respond back and it would enrage you no matter what he said.
Most Helpful Girl
A prick wish that exhibits his insider role, able to pull strings and even use this as a hook to pull you in, often precipitated by his little head wanting satisfaction from you... or remembers it.
Best to ignore it
Bad gals would thank him in a note and describe a perfect Bday date with someone unnamed much his superior in life that will someday whisk you away to Camelot