How do you know this person? if you are able to contact them over the phone or meet them in real life to confront them about it it may work better. contact them In a medium they can’t so easily ignore. Maybe even if you meet them in person, meet with a mutual friend there aswell. Just so someone can verify events if needed. this is just my 10 cents. I’m only 17 so I hardly have experience in that matter but thats just what I would do. =)