[Resolved]  SBI — charging for the unused credit card

After repetitive call torture of sbi guys to take the free credit card i agreed to take one. After that i didn't even use or activate that card for 2 months. Still the calls started coming saying the balance is due. So i created the amount and paid interest amount and never used the card. Now again they are calling me again and again saying there is a due amount of around 5000 to be paid. Why should i pay so much for not even using that card even once. To cancel the card it says account balance should be zero then only you can cancel the account. This is how sbi makes money? Initially irritate customers saying its a free card please take it and then simply charge for each and everything and then make money out of it? I do not want to pay a single penny. I want my card to be cancelled.