For your concerns about chipmixer, much better if you post your complain on their ann thread here https://bitcointalk.org/index.php?topic=1935098.0
And PM Chipmixer (https://bitcointalk.org/index.php?action=profile;u=1003345) about your concerns.

It will be resolved soon since I see no reason that they will ruin their reputation for just 0.04 BTC.