Damn it. Just deleted the letter some hours ago. But I am pretty sure by now I used a phishing page.
From now on I will use "bitmixer2whesjgj.onion" only!!
I am glad I got phished because I only lost a small amount of bitcoins. It would have bothered me more if they would have got away with more money.

This won't happen to me ever again. I'll be more careful next time.
Thanks for your help !

Yes I did it several times in many many different forms and also as you described it. But the Error messages keeps coming.

What I also found very strange was the date in the "-----START LETTER OF GUARANTEE-----" section. It says April but I mixed them a few days ago......

I used this "duckduckgo" search engine in tor to get on the bitmixer.io webpage and clicked on the very first link.
So is it possible that it actually was a bad link? 

No positive results at all. It says "Error: unable to verify".
And the support was not able to help me as well.

So I got something like hacked or just visited a bad link? Even if I used the same link as every time.

Hi there.
3 days ago I mixxed some bitcoins using "bitmixer.io" which got very good reviews. I also made great experience with it. However the coins I mixxed the last time never arrived at the receivers address.  And I am 100% sure I was not on a fake page.
Of course I got the letter of guarantee so I contacted the support. But they told my they weren't able to verify my letter of guarantee. How is that possible?! And is there any solution for this? 

Thanks for your help.