HDFC Bank — Change of PPF Account Branch

My wife and me had opened PPF accounts through netbanking. However, we were allotted Anna Nagar Branch in Chennai although I live in Kolkata and my registered address as per bank records is in Kolkata. I have written to my relationship manager as well as branch manager to change the address of my account but no action has been taken by them. I am unable to invest unless the account is shifted to Kolkata.