I solved this problem with Civic Wallet. I want to add this positive review instead of my previous negative post.
For Dentavoc DCN withdrawal, authentication with Civic was required. Now I authenticated with Civic Wallet and was able to withdraw my DCNs. For this, I used the HITBTC stock exchange.
The bottom line is Civic is a platform where you can verify that you are a real person from most countries except a few.