Consumer Redressal

Hi I had an outstanding vodafone number in Mumbai:9769444949. After three years some claiming to be from vodafone called to close the account. After negotiations My brother paid the sum of Rs. 3500 but did not receive the NOC as committed by the executive. Instead they stopped picking up calls and all efforts to reach out to them goes futile. I am just wanting to ensure that the number I once used is closed so that they don\'t come up after few days stating i have an outstanding amount with interest. I have sent e-mail to customer care but got no response. I also posted on the consumercourt.in site and jst got the reply that they wpuld look into the matter and get back to me. But no update so far as well. I request you to kindly look into the matter and help me in getting the NOC to avoid any unwanted billing and harassment in the future from vodafone.