Calcutta Electric Supply Corporation [CESC] — change of mobile number and date of birth

Address:43/8L/1A Biplabi Barin Ghosh Sarani. Kolkata 700067, Kolkata, West Bengal, 700067

My mobile number has been changed. How to do that? Moreover the date of birth as per your entry is also wrong. Instead of 21.08.1949, some other entry is there.
How to correct these.
You have mentioned that consumer number and phone number should not be entered here. Then how could i change. Please suggest how to do that. I shall be much. Obliged to hear from you.
Kalyan kumar bhattacharya.
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    Calcutta Electric Supply Corporation [CESC] Phone
    +91 22 2225 9157
    +91 22 2560 4049
    +91 22 2225 9156
    Calcutta Electric Supply Corporation [CESC] Address
    CESC House, Chowringhee Square, Kolkata, West Bengal, India - 700001
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