in order to steal money with plausible deniability.
Let's be realistic, nobody stole your money here, you sent it yourself, nobody asked for you to send anything.
Yes I am telling you that you are wasting time doing something that doesn't make any sense, but you can do whatever you want.
If you can't handle simple things than I am not sure you should be using mixers and bitcoin, since you obviously talk a lot with crypto support teams (CM, samourai, sparrow), so this is not your first rodeo.
And for what it's worth my opinion stands, if you lose the private key, you lose the funds. At this point I'm not even entirely sure what to make of you, or your situation. You said you just sent them a private key to your personal wallet over email - very bad..
Again, NOBODY asked him to send private keys to anyone, so he has a habit of doing stuff like this on his own.
It was one message to sparrow , asking why their mixer wasn’t working, they replied within 2 minutes to samurai team, which replied within 10 mins telling me to wait 24 hours and try again, I now decided to use whirlwind instead (no reply after 5 days) all of which happened the same day.