State Bank Of India [SBI] — request to release noc and clear remarks in cibil report

I had cleared the complete outstanding amount on my sbi credit card before closing my credit card. Issue for noc and update the cibil report. When i called sbi customer care for issue noc & no dues certificate, every time they are saying that, noc will be reached to my mailing address in 1 week.
As of now i did not receive such letter or communication from their end. It became very difficult thing for me because settled reflecting in my cibil report and my cibil scor has also decreasing due to this settled amount.
When i had paid complete outstanding on that credit card….. Why they are not able to provide noc & no dues certificate to me.
Please do the needful..

Regards,
Satish sharma
[protected]