Demarcation of the property in public records

Boundary wall encroaching road. Sir's, I bought a property in Kerala on 2016 and reconstructed the boundary wall facing main road which is in a zig zag shape. After the construction of the wall some local peoples including the ward member claimed the wall is encroaching the Road. But I just reconstructed the wall as per the area sketch provided to me from the village office and as per the extend mentioned in the property deed including three prior deeds. Currently I am in an emergency situation and the locals are creating problems and not allowing me to sell it .The demand from them is to straighten the wall . I may lose more than 1 Cent of land if I accepted their demand. Kindly suggest me how I can prove them there is no willful/ illegal encroachment done by me. Regards Sreehari