Living with le radin in Saumur, what should I do?

I live in a town of Saumur, in Anjou (Maine-et-Loire department). I live with my father and my mother. My father is a former cooper. He worked really hard, and with the help of my mother's dot, bought one of the finest vineyards in the arrondissement, an old abbey, and several farms. Then he became a mayor, but then the government changed and he was recalled for being a Republican. Then he did more business, and bought Froidfond, a big landed estate. My mother is very loving and caring, a real saint, but my father is le radin and le rat! We never buy anything all food, bread included, we have from the farms and from our mill. Even of this food, we are allowed to eat very little. We eat only spoiled fruit, drink spoiled wine, eat soiled whatever. He buys me about two outfits a year. We never heat our rooms. I get at five every morning, and work all day, there is plenty of work in a landed estate. I never minded, but then my cousin Charles (the son of my father's rich brother) came to us. My father grudged him everything, for example, he counted how many spoons of sugar Charles put into his coffee, and never allowed him more than two! He grudged him even bread. I was really embarred. Then we found out that Charles's father lost all his money and killed himself as a result. Charles decided to go abroad to earn some money. I heard my father boasting how many casks of wine he sold, and found out their price - my father must be really rich! I thought we were poor, the way we lived. Yet my father refused to help Charles, and we do live like paupers, saving on everything, denying ourselves even food! What should I do?