"9k followers"
Ermmm, I think Selena's team saying NO to him was a polite way to tell him that he's irrelevant & they want nothing to do with him.
Selena has actually done & said a lot of stuff that are under her lane, of course she will not be jumping on every single social issue. It's not realistic + that wouldn't be good either.
He can keep trying it with Unicef ambassador Selena Gomez though, nice try.