HDFC Bank — debit card blocked without knowledge

Address:

400708

My existing debit card which has expiry of sep 2020 hdfc bank deactivated my debit card without my knowledge and i did not get new debit card, i called to customer care many times but call not received no response, after that i reached to my home branch but the bank employee did not respond me properly, they ask me to call customer care.

How can any bank do this to his employee without the knowledge of its employee. So please resolve the issue as soon as possible.