Investors are pursuing the issue with SEBI , Ministry of Finance , Courts.
An immediate remedy is allow such Exclusively Listed shares ( like small cap gems Frick India , Dalmia Refractories ) to trade in Permitted Section of NSE / BSE.
Metropolitan Stock Exchange's licence should be cancelled and not renewed ( It expires on 14 /09/2018 )
. Then its Exclusive shares would have to be either Relisted in BSE / NSE or be given an Exit route.
also , please read