Reported flags for this user for violating the rules.

This user proposed the trade, accepted my friendship request in game and then totally vanished. I tried to talk to him several times but he just wouldn’t reply nor complete the trade. Now I’m at risk of getting flagged by a player I made a trade with, to whom I proposed the pet that this bad player was supposed to trade me.
Also, i snooped into his other trades and proposals: during our trading window he was offering the same pet to other users to trade and other players also complained he made the trade then just vanished.