Penalty in Property tax - Chirala municipality

Respected sir / madam, I have purchased shops in top floor of KKC complex, chirala. As per approval, Complex should be constructed with cellar, stilt as parking and G+3upper floors for shops. But, builders constructed shops in stilt also. Considering stilt as ground floor, municipal authorities started imposing 100 percent penalty to the top floor shops treating them as unauthorized. No penalty has been imposed on shops constructed unauthorizedly in stilt floor. It is very clearly shown that the numbers of floors and total building height approved in building plan are same in physical verification and were not deviated during construction. Another thing is, till now they have not served any special notice ( Form-D). We have requested municipal commissioner, chirala several times for form D in written to consider our case and do justice. but no response from their end.