I had little doubt since there were nothing to confirm in public that it's not made up (by OP). I did not have much time in my hand earlier to ask him privately for the materials but still I thought to leave a negative for smartmixer.io with a context that I will remove it once it will be resolved but after seeing two private verification by AdolfinWolf and LoyceV - especially from LoyceV who I trust to some degree; I really feel bad for OP.

That's a lot of money and I am starting to realize that it is an exit scam now. There are no other reason for smartmixer.io to do such things.

Crypto industry is really very much vulnerable and it's because of some small group of scammers. This people really do not have any moral. If they would use their skills for good things for the human race then the world would have been a better place. So sad that we can not do anything against them. Sometimes I feel frustrated when I see innocent people losing their hard earned money this way. I to lost some good amount of money in my life. But we survive and this is life.

I am really sorry for you OP. I will hope my best that smartmixer.io realize that they are playing with someone's life (10BTC is really a lot of money for billions of individuals) and this is no way ethical. How would they feel if they became the same victim by some other scammers? How would they feel if one of their family member become the same victim some day? I have seen people to hospitalize and then to die because of the shock of losing everything they earned in some incident. This is really not fair.

I wish your best health OP and if you do not get anything in return then just accept the reality and move on. Life gives us hard time and those of us who can make things once then we know the way to do the same again and again. I am going to revise my tag with better contexts and the flag was supported.

Stay safe everyone.