Illigal construction of road by former gram pradhan

Sir many years back gram sabha alloted plots to many villagers and our family bought them and we covered it boundry so one road road was planned as per gram sabhato be construted all around the village and ut was to cinsteuted firm one persons agriculture land,later he became pradhan of village and he took help of some revenue employees and changed it from his land to our plot so he could save his land and road was constructed passing our plot,when we complain everyone was convinced that documents are saying it will go from ur plot bcz he had changed these documnets so after that his confidence was on top now he is trying to construct his main gate in our land and now ee dont want fight but want to trouble in legal activities and also in that road so i need ur help for below questions 1) From where can j get these records of road which was constructed and how and why its location was changed and who was involved 2) how can we lodge complain if he tries construct his gate on our property. In construction of gate our ancestors made a mistake they gave him space for one window bcz of darkness bcz he requested for that but on the behalf of that window he is claiming this place as his. Plz guide..