My manager told me when I asked him to release by end of March(currently serving notice)he said ok and will try now he is not responding..?

Don't believe in Verbal conversation / promiss....thumb rule

Reduce working , simple

I asked my manager for release on last July and I am getting release on April 🤣🤣

They'll not respond or they'll try to convince you, after April 1st week, send mail and discuss.