State Bank Of India [SBI] — unauthorisedly annual charges and penalty imposed on my credit card

Address:

Mumbai City, Maharashtra, 400018

I am chief manager in dena bank at worli branch, mumbai. The representative from sbi card had visited my office year back and offered sbi card free of charges being dena bank executive. On assuring about charges; i had applied for it and surprisingly, after one year i received bill being annual charges of rs. 589/- for which i have had sent so many emails that it is not genuine and i will not pay it and again received bill with penalty of rs. 500/- for payment.
Sir, please intervene in the matter and remove charges and close my credit card immediately under intimation to me.
My email id is [protected]@gmail.com