Scammed?

[MarieCurie]

I feel that i was scammed by misterolo09, He put up a Mew and 1.5m for my Void Pelipper which i got from trading a Shiny worth way less but i still accepted, The person who traded me the Void never messaged me saying anything, The trade was up for about 4+ hours so he would've realized if it was wrong or not, I had 2 mews underneath the trade so it looked like i was trading a Mew for 1.5m, I know Mews are worth like 50k, I always do the right thing but sometimes it's peoples choice to overpay.
I'm not sure who traded me the Void Pelipper.

Pokemon= http://prnt.sc/ab0koy