I'm not entirely sure how this happened but I'm pretty sure I've been hacked.
I don't want to rub salt into your wound, but you just made bitcointalk forum with all members look bad, and you damaged your reputation.
People trusted you on both sides, and I don't see you made clear step by step explanation what really happened with coins you received.
Situation is even worse since you already own a hardware wallet, and you can easily connect it with Electrum wallet.
I am not saying you stole the money, but acting this way is no better and I have seen people getting negative feedback for smaller mistakes.