What to do in case of my friend's spouse not giving divorce ?

Hello one of my friend is in trouble for case of divorce. her husband filed divorce but now not giving divorce. husband's mother keep delaying and trying to make it more complicated by filing 2 more cases which is completely irrelevant like filing defamation case against my friend's family on no basis. they also give some bribe to police so even police is also not listening. she is trying every single way to get it delayed and dragged unnecessarily as she knows if divorce is completed my friend can live happy life ahead which she do not want. As she also know her son will not get re-married because he is impotent. now in this situation instead of ruining life of girl what is the best way to get rid of it? is our Hindu marriage and law system does not allow human being to get free from such torture? how fair it is? what is the best way to get rid of for my friend. i cant imagine the pain she is suffering while other party is least bother and not interested to turn up and trying to fail every single effort to divorcee. plz suggest concrete proceeding. is there any trick to trap them as they are playing game it seems to my friend's life because of their power and giving bribes to police etc.