Coinexchange ( 0x4b01721f0244e7c5b5f63c20942850e447f5a5ee ) is doing some shit lately. They won't let you withdraw POS token despite the fact that the wallet is okay . ...You can check the Address through mining calculator to see thousands of token the address has minted. Shame on coinexchange
Its been on maintenance ever since POSTOKEN got listed there. If they are using people's postoken to mint then this is very unethical move for an exchange platform.
You should collect more evidence and open a scam accusation on them and hope they will stop on their evil deeds.