First of all you should go back and review your previous prescriptions of glasses again. Note down if there are frequent changes in the spectacle number. If yes then it suggests that your keratoconus
in that eye is progressing. So first question to address is to stop the progression: Treatment available for it is collagen
cross linking using ultraviolet light. (Advised depending on you corneal thickness)
Now.. Second worry is how to improve vision.. If you have very high cylindrical number then rigid contact lenses is the best option for you. If vision does not improve even with contact lenses then we will have to think of surgical option which includes keratoplasty which can be penetrating ( Replacing full thickness of cornea) OR Lamellar ( Replacing part of cornea).
Your third question is affordability,
You can come to LV Prasad eye institute Hyderabad If you cannot afford treatment can be done free of cost here. Details are available on net.
Wish you good health.