Leaving without notice in a limited-term contract and expected legal actions

I entered into a limited-term contract with my employer in Feb 2021. I worked for 2 months and then I traveled to Mumbai for a family medical emergency (Covid).

Now that the flights are suspended, I am stuck in Mumbai. I also resigned from the company since I have to stay back in Mumbai to take care of my house.

My employer is asking for 45 days salary but I don't have any money to pay him. What is the way out?

I also offered him notice from Mumbai but he is refusing and not settling things as well.

Can he put a ban on me?

What are the legal implications if I don't pay him?