Jodhpur Vidyut Vitran Nigam Limited [JDVVNL] — electricity bill too much of electric bill than usage

I'm getting too much of my electric bill than the usage..in aug 2016 i got a bill of 1502 [billed kwh] and in november 10218 through the usage were same as in both months but the difference was around 8700 kwh more.. & from that regularly m getting high bill since this dec. 2017 and also, my electricity bills are being charged incorrectly pls. Check the attached file for understanding properly. So i doubt if something is wrong with the electric meter or else someone is doing some unauthorized use of my electric.. I even have complained in the electric office here but there's no feedback.. So plz help...