Considering that you have pain in affected tooth, the extent of infliction might be more than what a simple filling could manage.
A filling would cost you somewhere around INR 500 to 1500. But if the tooth is damaged to a greater extent you might have to shell out more money for the appropriate procedures to save the tooth.
Next Steps
Visit a dentist for a clinical examination and an intraoral X-ray (radiograph) for a better evaluation.
Health Tips
Do not prolong treatment or curb pain with painkillers for a long time. These things usually worsen with time and you may lose that tooth.