What are these new coins you've bought?

You're cheated? Likely and they're just for the money of those newbie buyers and don't want to be transparent with you guys because they're just for the sale.

Any reason why you can't resell it?

Does the exchange disable the trading pairs? AFAIK, for new projects and old ones if the exchange disables the withdrawal and pairs, there could be a reason for it. What does it says in your account?