Maintenance Amount Of My Wife And One Year Son

After trying many times to give my son's name came to know in municipality office that his name already given by her parents without informing me..and on that day she was in her parents home...I was rebuked in municipality office due to give by son's name which was already given..on that day I rebuked my wife through phone.from that day eleven months over ..she still don't contact with me...now I don't want to b with her...what should I do???my wife's age is twenty..and age of marriage is two year seven months..I don't want to talk with her never...what the amount of maintenance of that could be ordered by court...????my salary is 19400..after cutting in loan get 16301..