I don’t know why people continue to use websites that have a lot of problems
[1], Privcoin(dot)io has a lot of issues which took a long time to solve.
Even they on MetaMask phishing list:
"Hi, I've blacklisted the domain as we had many reports on Etherscan and EtherScamDB about coins not being sent back.
I will be investigating it more before considering a whitelist."
Generally, try to contact the support team, if they do not respond within a week, you can repeat this request.
[1]
IS PRIVCOIN.IO A SCAM