Non payment of dues by guests to the hotel

Honourable Experts I am Sunder Rajan seeking your help on matter of non payment. With my retirement money I now own a resort on the outskirts of Nashik city. A couple of months back a few guests arrived at my resort for a weekend stay. They paid an advance amount of Rs 10000 for their total package of Rs 25000. However on the day of the checkout the guests refused to pay the balance amount stating flimsy reasons to my hotel manager There whimsical reasons included no mobile connectivity, no hot water coming all the time which my manager explained and rectified to his best efforts. But without listening to reason the guests created a ruckus and ran away from the resort before my manager could call the police. The local police is not of much help as the claim it is not their lookout. My people having the contact details called and sent emails to the guests and the guests are refusing to pay the amount citing the whimsical reasons. I also engaged a local lawyer who sent a legal notice to the guests but they are refusing to accept the legal notice also. What can I do to recover my money. Please help Sunder