Calcutta Electric Supply Corporation [CESC] — high electricity bill charge

My name is hitesh das carrying [protected] customer id with cesc..in this lock down we are all stuck in the house.. But like every month there is no meter reading date and unit consumption alert from cesc. But suddenly they arise a bill without meter checking and meter reading acknowledgement. They are totaly double the unit from last month and arise bill.. Now they don't have any executive to resolve this problem when make a call in 1912..
Please take positive step to do the needfull..