Calcutta Electric Supply Corporation [CESC] — please change our phone number

My mobile number which is given currently has been changed due to some reason. My old mobile number is [protected]. And my new mobile number is [protected]. I request you to change my old mobile number to my new mobile number.
Customer id [protected], i am facing problem in getting messages from cesc and cannot pay the bill online. So, i request you to change the number.
Thanking you.
Consumer name: (Late) gobinda chandra das.
Consumer id [protected]
Ichapore. Pin 743144
25 february, 2019