Airtel — unable to generate upc

Address:

New Delhi, Delhi, 110095

I have a prepaid airtel number [protected] for which i want to generate upc code for mobile number portability but after sending several msg for the same airtel is not giving me upc. Everytime i send the msg to get a the upc they charge me msg charge but not giving the code. This is seems to be that airtel is cheating their own customer and restrict them to opt out from airtel by not providing upc. My alternate mobile number is [protected]