Standard Chartered Credit Card — unnecessary claiming money from me

Address:

South 24 Parganas, West Bengal

I applied for credit card from Standard chartered Bank. They sent the card but I did not get it because I was not in home
That time. After that I got many calls to pay the credit card dues, I told them many times that I did not get the card and mailed them also.
After six-seven months they informed me you pay Rs 7500 for settlement it , otherwise they will register my name in civil court.