Maintenance order by misleading information

In counseling wife said that if husband gave divorce wife will not demand any thing. HUSBAND was adviced to give divorce to her. But considering the baby’s future husband refused. HUSBAND filed say to the family court, On next date Judge asked Wife to bring evidence. That day Judge was absent and wife don’t bring any evidence. Clerk in the court said that next date is for interim order. On 29.5.2017 (next date) in court her advocate told that Wife is ready for plain divorce (without any money). The HUSBAND answered that thinking the child future HUSBAND not ready for it. After that Judge asked HUSBAND how much you can pay to her? HUSBAND said HUSBAND is ready to take responsibility of her. HUSBAND can not spend extra as such. again after asking same question HUSBAND said that , HUSBAND was earning previously 20000/- but due to complaints and tension, HUSBAND lost good job. Now HUSBAND is doing part time job and getting 7000/- so HUSBAND can give 500/month. Her Advocate stated that HUSBAND might be doing many part time jobs and having handsome Income. And HUSBAND not spending a single rupee on her. After that Judge accepted his opinion and considering my Income as 20000/-,ordered 2500/-+2500= 5000/- on 29.5.17 for wife and baby from date of application. Husband gave 50,000/- by cheque at the time of delivery in hospital. Husband have paid upto Oct. 18 Rs. 130000/-in to the court, borrowing money from relatives . Now Husband filed ITR showing income 90000/- for year 2017-18.What is process and format application to reduce maintenance or set aside previous order which is based on wrong assumption and misleading information. Can money get back.