HDFC Bank — Related to credit card bill

Address:

Kanpur, Uttar Pradesh, 208017

I have issued a credit no [protected] which i didn't yet used for atleast one time bt still i get a bill amount of nearly 6000 i hv that bill too n asked for no dues certificate they refused to give n next day they again called n telled me that 15 rupees more left i don't know the real statement of my bill i want but no one is helping me my contact no [protected] hope u will contact soon for my help