Yes, you were scammed. Just curious about how did you found this mixer and why you had made a big transaction before test it? How did you found this thread instead of their official thread ? I am asking this question because their official account already accused for scam and got multiple red tag. If you had been searched before sent funds likely you would be safe. Nothing could done now, you lost your funds although I am sorry to say. Just make a accusation thread on Scam Accusation board with proper format. It will not back your money but you may warn other peoples to stay safe from these scammers.