Please use this app to find and meet a good ENT Specialist in your own locality to examine you & do the needful. If you are able to make it to Bengaluru, I would be very happy to help you out myself. My clinic Healthcare@Basaveshwaranagar is easily navigable on Google Maps. I am legally unable to prescribe you any medicines without physically examining you. This forum is intended for second opinions after you have consulted a doctor locally. Please upload the doctor's notes.

The operation that he would require will be to close the hole in ear drum once the ear is dry.the rates range from hospital to hospital, the government set up will be economical 1k and in corporate set ups it will start from 40k to 70k depending on wards surgery duration. The hearing aid also ranges from 3-4k minimum to 1lakh the costlier the better as there is warranty and usage friendly.

Best option in your case is Government ENT Hospital in your city. It's free.