I was using btc mixer long time and I always used bitmixer.io
Yesterday I wrote in google bitmixer to find the site and in accident clicked the add which was biFmixer.io , and NOT biTmixer.io and lost my coins.
So be careful guys
You should be more careful next time and always double check the links of a website that you are in especially if you are dealing with account details and money. People are desperate to steal other peoples money and will do everything to get your money. always check the letter of guarantee if you are dealingcwith bitmixer to make sure that you are using the right service.