An ex-employer asks for the new visa copy of an employee. What to do?

Hello Sir,

I was fired on JAN 20 2020 on the second day of arrival from vacation. They gave me 2 months of grace time to use the same visa to look for a job and also to settle my dues.

By April, they canceled my Freezone visa. I didn't get any job till Dec 2020 because the pandemic started, so I stayed and was looking for a job. Almost after a year, I got a job; the whole year I was jobless.

Almost a year and half later, my old Pro is threatening me if I didn't submit my new visa copy, they are going to file an absconding case on me.

I'm totally confused! How it even possible after a year and half they want my visa for some refund or to file a case against me?

Please advise on this!

I'm totally frustrated!