What exactly happened to ESL(ELECTROSTEEL STEELS LTD) stock

holding reduced in the ratio of 1 existing listed and trade share in swap of 50 old share thus 1000 share become 20.
moot question is : why this share is trading at 67 when it is clear that it will be compulsorily delisted at some 9.57 per share .
the only thing which come to my mind is that it may not be snatching of shares but shareholders will have option to keep unlisted share . a very dangerous move if investors are buying with this belief that after few years the unlisted ESL will be merged with unlisted Vedanta star (who bought ESL) and Vedanta star will give open offer or list .