HDFC Bank — discrepancy in credit card bill

HDFC Bank charges me incorrectly according to my current statement of Credit card of the month August they generate bill on 20 th August. If I calculate the whole amount mentioned on my credit card statement is of INR 13, 806.36 and I received the total amount to pay is of INR 26, 456. In the statement the amount of INR 12, 649.64 is not mentioned that why they charged me the extra amount, and when I asked them to mention it on my statement they denied and I dropped almost 4-5 mails regarding this concern but they are not providing me with the details, I told them that I will pay the amount of INR 12, 649.64 if they will provide me with proper details, but I m not getting any response from there end and I contacted there customer care as well they are asking me to wait again and again, they are saying that this is your last bill amount but we cannot mention this on your current statement, I asked them to provide me with all the details in my statement then only I will pay the whole amount.
Name - Shrreya Gupta