This is hilarious.
If you were elite enough
you take what he said in the part of his message that he so politely provided us a screenshot with.
he's provided the email address to contact Instagram about
'intellectual property'
he's basically all but given you the exact words, but a layout to what you need to say.
LOL GG NO RE.
On a totally related note:
this shit used to work back with Myspace & Twitter (believe it or not before they closed their help and started calling it the XenDesk)
They loved releasing inactive usernames to intellectual property type folk.
GG, again. No Re. Please. I like you.