He has already tried to reach forum account but no luck since the account isn’t much active.
OP, I think you should post this issue on their ANN thread if you have not already. This may help you to gef their attention. They used to be trusted to me as well but the way you are referring, it seems selective scamming after gaining enough trust. By the way, you can try Chipmixer or blender.io, these are some good and trusted mixer.
Thought this project was already dead?
And if I remember correctly these privcoin guys sometime late 2019 got hacked and price crashed and there response was to issue new forked tokens and that was a red flag!
I guess we are talking about a mixer.