Liv Care Water Solutions — amc contract done by liv care solutions

I did my amc for pureit ro with liv care water solutions in january 2018. They charged 10k rs for 3 years contract. Ro machine needs a kit change. I am trying to call on the numbers mentioned on the amc bill and all numbers are switched off.
This is highly unethical practice. Look at other complaints as well, it appears that they just wanted to collect money by doing 3 years contract and now they have fled.

This is a pure cheating and loot of hard earned money of customers. There should be a way to track such cons and get the money refunded to all the customers who have paid them in advance for three years showing trust in them.

Please advise what action should we take next.