Can I demand Manager for B to A band Revise

You can give a try atleast they know you are not happy and if they mention about any improvement then your can consider next year

You can demand anything...

Like food allowance

Reimbursement of rent ...

So the band change

But important is what will you get 😎

You can but nothing will happen , initiate a mail chain and lodge a complaint on grievance portal. Do not talk with your manager on call everything in written and log every meeting with MOM and send on mail chain.

They won't. It's useless.