Tamilnadu Electricity Board (TNEB) — wrong calculation of ACCD

service no[protected] sub ramaniam mobile [protected] palladam on 6/3/15 meter shifted and tarif chan ged from 5to 6 .noarrer in tarif5 after 22 days reading taken cc180 paid previous final reading is taken as intial reading(4704)billamount is fixed as40131for 22 days it is wrong.never used more than 100 unis for many years based on this amount ACCDis fixed as8910 no qn of accd is required sufficient amount is inmy a/c pl cancel accd8910 repoted to s.opaladamon writtng5/7/15