Individual — Unauthorised construction penalty in Property tax

I have a flat bearing Assessment no:[protected] under revenue ward 13, Zone 9. In recent revision of property tax calculation Unauthorised construction penalty was imposed.
We have Occupancy certificate in 2016 and the same was submitted to avoid penalty in year 2016 it self. In the same apartment some falts are getting this penalty and some are not. Please rectify it.
Every time we can not roam aroud offices for their mistakes.