Mescom — I am complaining about the electricity bill arrears related

I received power supply bill for this month, where rs 800 shown as arrears. I contacted local sub-dvn. He told me this is temporary connection bill for 2018. This has not shown in the bills for the lost 3 years. If it was towards temporary connection, this must have been adjusted or recovered while giving regular connection. So please enquire and give me full details. Also furnish me the rules stipulates temporary connection and it's regularisation. Pl give details of appellate authority to file against this bill.