HDFC Bank — paying extra payment

Dear sir,
My name is .S.Ranganathan iam having credit card of hdfc A/c no is [protected].

i have closed my a/c with nill balance one year before.and i have sent closing letter also but iamm not received closing letter.
3 year before i have taken 17, 000 (seventeen thousand cash loan) for that monthly premium is 565/-
but iam paying monthly Rs=1000 or 2000 also.but hdfc bank credit, they are not sending statement.when iam call customer care they not informing me the balance amount.
iam very confuse i have paid more then 30000/=now i want close.the my a/c.
please do the need full.Thank you.

S.Ranganathan