Done my root canal treatment,they ask me to pay 2200 for that and visit after a week now a week gone after my first visit they did drilling something and told me to pay 6000 because they cant fix the metallic tooth of less height does it cost much?

This is a general education site, not an individual second opinion site. If I understand your question correctly you had root canal treatment and now the tooth needs a new crown. That seems to be standard of care. As to the cost, there's no way that we would know fees in your area, 8,000 miles from here. If you want a second opinion, see a Dentist in your area that can actually examine you.

GO TO THE DENTAL SCHOOL IN YOUR AREA IF THERE IS ONE AND SEE A SPECIALIST WHO DOES CROWNS.YOU COULD SEEK A PROSTODONTIST IN YOUR AREA FOR A CONSULT AND FEE DICCUSSION. YOUR FEES ARE IN RUPES NOT US.DOLLARS.