HDFC Bank — hdfc bank continuously charging extra amount on credit card since last 2 years.

Hi my name is gomtisharan and i have one hdfc bank credit card since 3 years. Hdfc bank always charge heavy extra amount on each month statement either in the form of interest or late fee. I am fed up today when i look at the statement even after making full amount payment of this card before generating the statement after making call to customer care. They have charged 1830 as a finance charges and when i call to customer care they said sir i am taking your request for reversal but it is depend on bank if they reverse this amount or not. Now my question is if you impose the finance charges even for a single day then how customer can close this card because if he make the payment and after that atleast 48-72 hours required to update this payment in their ststem. During these 2-3 days they again charge interest so it means you can not close this card because always there is some amount due for payment. I would like to request you please provide me contact number of consumer forum so i can call him and can register my complaint for this bank.