Tamil Nadu Electricity Board [TNEB] — Excess charge of eb bill frequently

We got eb pill payment of rs 1443 but extra they Cc arrears chargesrs.1155 even if we paid correctly within a due date...past two years we had payment history of eb bill within a due date..but now extra rs.1155 they charging even if we call eb office AE alagarsamy and Raja of department never response properly for the issue and asking to visit the office and talking badly