HDFC Bank — Updation of Mobile number

Address:	HDFC bank , NIT, BK Chowk , faridabad
Website:	hdfcbank.com

HDFC is one of the pathetic and worst bank ever seen in my life. their personals are talking very rudely and not sense of how to talk with customer

My number was getting deactivated long time ago and when i visit my nearest branch for number change. first they say it will be done thru netbanking ( surprisingly they don't have option to update mobile number thru netbanking ) then I again visit the branch, after filling a form, they said it will be updated within 7 days. after two days they told my that my application is getting rejected because i was not using this account from a long time and have some negative balance in it.

I told them that i want to update my number so that I pay settlement account. but they say that first i have to pay the negative amount and then they will update it in system.

Is that a valid reason, I just to update my number so that i will use this account in future.

I never use HDFC in my life ever again ... they ruined my credit score as well