Uttar Pradesh Power Corporation [UPPCL] — wrong billing since july

Address:

Plot no. A3/1, Flat no. SF4, DLF Ankur vihar, Loni, Ghaziabad, Uttar Pradesh, Ghaziabad, Uttar Pradesh

Sir/Madam,
My consumer number o[censored]ppcl is [protected]. Uppcl has generated a surprisingly wrong bill of amount ₹19787 for the month of September. I would like to inform you that the flat is empty since last 3years and since mid 2016, I generally paid around ₹300-₹500 as the regular maintenance surcharges. You can check all the previous records. I have always been regular in paying all bills since the time I have vacated my house, i.e. from July 2016. But since July 2019, out of nowhere they have imposed a bill of ₹18000 on my head. The flat is vacant since last three years, you can confirm the same from other flat owners. Please resolve my issue. I am in need of your interference in this sensitive matter.