Seriously?
Just got scammed... Lost like 1400 USD
Letter signed by 1CrypMixAFEt56Mqts2sFnTF1RPCwE1BXk but used their website as usual
It's your responsability to verify that your sessions' letter is correct and signed with their correct, publicly known address.
If the session hasn't expired yet, see if this link exists:
https://cryptomixer.io/api/v2/operations/ORDER-ID-HERE/letterOfGuaranteeIf it doesn't, it's your word vs their word.