Yea, scammer for sure then. Did the e-mail account and address shown on BL match the ones on PP? That’s one thing to watch for.
Agree, the chargeback fee is BS.
You’re having a rough day, my friend. I recommend a nice chamomile tea whilst thinking about butterflies, and letting the troubles of the LEGO resale world and cloven-hooved menaces go, at least for the rest of the evening.