In order to focus on building a decentralized option of exchange, Metal X exchange really ended it services to the users and also asking them to withdraw their funds before a specified date of March this year. This exchange in no way ever scammed anyone and didn't just disappear without leaving any traces because everything was well outlined with notification being given to every registered trader on the platform.
They currently do not accept any new sign ups to the exchange platform and is said to round up every form of trading activity before the end of this year. We can all be hopeful and look unto the release of his decentralized option called Proton Swap or make use of other exchanges. No much information has been given for Proton Swap but updates will be rolled out soon. You can keep to their community groups to know more