WHY DID YOU USE SUCH A SERVICE IF YOU ARE LEGITIMATE?
This has gotten really weird. Is it worth pointing out, again, that nobody gives a fuck why he used the service? Nor should they?
My guess is you are exasperated over waiting for an excuse to move the funds, so you are inventing this "let's hate the OP for complaining" sideshow to make it seem like you were justified for stealing his bitcoin. Is that about right or what am I missing?
It's also possible that this flipnoob is trying to convince us that their "letter" can recover the funds, thus OP should pay some small amount for such a service.
LOL, nice one.
Ive already said a letter is useless at this point, and such letter can be obtained for free on many Crypto discussion sites, as long as you have nothing to hide or done anything wrong, and the registered "Company" has a legal department to forward it too. Its not hard to find the legalities of such situation, providing most importantly you are dealing with a company and some scammer in the form or a mixer service.
But he chose to use an illegal or rogue service to an unknown individual, not company. For what ever reason, it was ridiculously stupid, and I would say, brainless, to send that amount in 1 TX to such a place. Although I do feel for your loss Mr 13BTC, I do not pity your stupidity.
Nobody knows who Mr Mixer is, and I doubt you will ever find out unless you pay some hacker slash investigator like I saw you advertising for.
Even then, if you do find out who he is, what are going to do? File a police report, maybe they will catch them, prosecute, recover funds.
But at this moment you have as much chance at recovering you three quarter of a million dollars just as much as a vicimt of a Nigerian romance scam, or indian Tax scam has at recovering theirs.
Virtually zero sorry If I am being harsh, but that is the reality. I work with compliance, fraud etc with Crypto everyday, its not looking good for you.
I am just baffled why you would even send 13BTC, at current price $761,035.60 to a place with no information on ownership. Hence why the accusations came so quick, as only a criminal, or and absolute idiot would do such a thing.
Again sorry for your loss, maybe I am being a little hard, but in my experience what I see everyday, and honest opinion. Your funds are gone.
If you are a criminal, that amount of money must put you quite high up on the criminal ladder. I guess the other option, if you are such a person, would be to find who owns the site and do what a criminal would do lol.