My colleagues shared few contact details who basically organised such activities. So we reached out to Skywalker and they have different charges based on the number of days you want to give. At our time it was IDR 750.000 per head for one day that included safety equipment, guide and instructor, one time meal and refreshment drink. Another package of 2 days and 1 night cost IDR 1.500.000 (Indonesian Rupiah) per head which is around 7400 INR. They provided transportation as well but they charge extra for that.
We started our trip at 5:00AM and we reached our destination at around 11AM. It was a beautiful road trip with mesmerising weather. The funny and most terrifying part of this trip was our guide couldn't even speak and understand both English and Hindi. He could only speak Bahasa(the official language of Indonesia). But we barely could understand Bahasa. When he was giving us instructions we were totally blank. But by God's grace one more group participated in the activity at the same time and one person from that group translated everything from Bahasa to English for us.
I remember there was a time when we were at a good height and there were two routes and we didn't know which route we had to follow. We waited so long there for our guide to come and rescue us from that situation. We were shouting for help. After around 20-30 minutes he came and then we followed him. But the spirit of adventure in us kept us going till the end.