Worst Bank service ever from Employees

Location/place: Bangalore

Name of company/service: HDFC Bank

I requested them to please provide me new IPIN and to update my mobile number for food pre-paid card.but its already 2 months but didnt get any response. I mailed to head of the service but I dont know what they doing.

find the details of the persons whom I have contacted.

[email protected]
[email protected]
[email protected]
[email protected]

My Mobile number: 8123501091