HDFC Bank Bank Ltd, Chennai — NOC NOT YET RECEIVED

Hello sir,
I AM SASIDARAN FROM SALEM..I hold a HDFC Credit card . i have made a MY ALL AMOUNT of Rs 28000. they said U will be receiving the NOC letter and No dues letter. But until not i havnt received any thing. The amount has been cleared and refleted in Statment also. Today i spoke to the customer service . they said they dont have the details of the payment. How come they dont have the details of the payment and other things. i need to file a complaint on this. please help me tos solve this.THE ADDRESS OF THE BANK IS GIVEN BELOW
DIVYA
HDFC BANK PROCESSING UNIT,
A WING CONSULTANCY ,
102 NELSON MANIKAM ROAD,
SEBROS BUILDING,
CHENNAI