Maintenance under Crpc 126

Dear Sirs, My wife filed a complaint in 2010 and left the house. Police had asked her Father to bring her back after one week for reconciliation, which they didn't do and since then staying with her parents. In 2013, they again approached police at their native place with another compliant and we had three meetings in Women's police station and we had taken society people which the police had requested. They (she, her father and her brother in-law) agreed to send her back within next week but she refused to join. The entire game for approaching police for the second time was to grab some money, as the police told us that she wanted to go for higher education and was in need of money. When this ploy failed at police station, she filed for maintenance case for her and my son who is 10 years old now. I did not contest the case and an ex party decree was awarded, which I went on paying. I did not contest the case because I stay abroad. Now she has filed for enhancement of the maintenance amount and the court has granted it. Recovery notice for the arrears was served recently to my house amounting nearly 1 lakh. Now I want to contest the case and request your advise/guidance on the following, • Is my presence during the court proceeding required? • I know that she is working, but don’t know the ways to collect the required information so as to get the maintenance amount reduced. • If I don’t appear before the court will a warrant be issued and if so, how to overcome it. Please advise.