State Bank Of India [SBI] — Noc for my sbi card

Hi,

I have cleared my outstanding dues in my credit card and had initiated a card closure regarding the same.
I was told that i will be soon receiving a soft copy of the NOC on my registered mail address as i had requested for one.
I have been waiting for more than a couple of weeks now. Have talked to several representatives from SBI Card Customer Support (Let me tell you that they know nothing and are extremely rude over the call) but all i get is the same deadline "WITHIN 10 WORKING DAYS". By the way, it's already past 10 working days since i requested for one. All i need is a soft copy of the NOC to be sent to my registered email address and that would be enough.
I don't really understand how difficult it is to get one.
I also have a credit card with an international bank and the kind of service they provide, is phenomenal.
All i can say is that i will never ever bank with SBI and definitely not SBI Cards as they keep running behind us in malls and literally nag us to the level that a person has to get one, just feeling pity for the sales executive.
Pathetic service. Simply pathetic.
I would just want to request for an NOC soft copy to be sent to my registered email address at the earliest and show the same on my CIBIL report as well.