I also thought about malware, clipboard malware and even using a phishing URL as possibilities behind this allegation because of the amount mentioned ($30,000-$40,000) is huge but there is an update on this situation.
Thankfully a lot of time and effort has gone in to the translation that has taken place. It seems to be something of substance to the claim:
https://bitcointalk.org/index.php?topic=5491818.msg63911576#msg63911576I'm wondering how you were able to send about 30,000-40,000 USD to a site that I had never dealt with before or had the necessary trust? It's weird !!!
~snip~
It is really strange for anyone who behaves rationally and has earned such money in any
"honest" way to simply go and do such a sensitive operation without any prior checking. However, without any evidence, maybe the OP is just a victim of clipboard malware and the mixer sent coins, but to the wrong address.