It was discovered that this guy is a serial scammer over a year ago. A simple search of scam accusations would have allowed you to see this yourself.
Agree to all said here, it was stupid not to search first. Hope this thread helps someone else in future ...
Or you should probably avoid "Mixers" altogether.
What is "reputable" mixer anyway? I read ppl saying bitcoinfog but its also semi scam (often down and losing coins). I also read "use LTC<>BTC ... exchange" but it's silly, as long as exchanges keep infinite logs about address-in and -out (and they do of course). So, what are real options to anonymize btc?