Airtel — prepaid to postpaid address verification failed

Address:

House no.3129, street no.2, jawala singh nagar, pb141015, Ludhiana, Punjab, 141001

I have visited airtel store to convert my prepaid number into postpaid i have done all the formalities there. They charged me 300 rupees and said me an agent will come to verify my address but now one has visited me. I have call the postpaid customer care... They surprised me that my address verification has been failed. But store persons still saying that an agent will visit me. Many days passed but no one visited me