I have no idea about your medical condition, so I'll just mention the options available in general.
1. Conventional open surgery - Not so commonly used nowadays.
2. Laparoscopic surgey - a keyhole incision is made in the abdomen, and using a thin device, the stone is approached and removed. Probably the most commonly used mode of treatment nowadays. It is done under general anesthesia though, so depending on your overall medical status, this option will be/not be available for you. But it is usually very short procedure, and you might need not more than 2 to 3 days stay in the hospital.
3. Oral drugs to dissolve the stones - are available, but they take a longer time to act. And some stones might not dissolve or might take a very long time.
4. Shock -wave lithotripsy - is probably the best bet in your case, but I don't know how many institutes provide this treatment. But it is definitely available in India. Here, using high-fequency sound waves, the stones are broken and removed. Non-surgical and very safe too.
Hope that helps.