That's strange, shouldn't the standard verification be via documents submission through the platform instead of Skype?
This is normal situation to prove that you is a real man, when the casino has some doubts that you is a real man.
The OP: Did you KYC before Skype verification? What documents you was asked? May be you have different real name and Skype account name?
Probably, you made a mistake, when KYC, but i don`t think so.
Based from the foregoing comments on this thread, one thing is certain- the KYC documents that were submitted did not match the identity of the person playing on the gambling website. Since the casino also mentioned that they have strong proof and evidence against it, then you are bound by such decision which, unfortunately, locks your account.
You should have dealt and understood this when you broke their TOS. When you gamble and try to circumvent what is stated, then you bear all the consequences of your actions, OP.