Most Helpful Guy
Tell em' he had a chance, his dumb fault, and you dont offer "do-overs". You have more class and respect for yourself than that (then you can't take him back because he'll know you dont respect yourself and he won't either).
Most Helpful Girl
Tell him (via call or text) to stop all contact and then block him. If he persists, it could qualify as harassment, at which point you could get a restraining order.