Father - Debt and extra marital relation

Hi Sir/Madam, My family is in middle of a horrible situation. My father has been working a guest house controlled by the 'Asansol and Durgapur development Authority', a state government of West Bengal authority. He was exposed to us of having extra marital affairs in 2013 and continuing the same till now. He spends the advance money which is paid by customers for booking a room in the guest house. He then comes to us (sons) for getting money. This time he already have spend the advance monet till March 2018 and asking us for the same. He is extremely irresponsible and a cruel liar. His debt is continuously increasing. We did several try to pay back the debts for once and all. And bring my father back to home(he stays in West Bengal, our house is in Jhanrkhand). We tried to persuade him to quit the job and come back to home as he was unable to save money for his monthly expenditures also. Till now he some how extends the date to resign his job. Each time he needs money, he lies and tries to take money from us by any means. How can we save our family from the debts and extra expenses that he is incurring each day? My family has my mom, grandfather, younger brother and myself except my father. Now I am staying outside India for work purpose and will be back in a few months. Please help.