Consumer Redressal

I applied for post paid to pre paid of my no 9867315876 on 27th July at Chakala, Airtel Gallery,Mumbai. But even after 1 week my problem remains unsolved. I even mailed so many times to 121 and airtel nodal officer but all in vain. I even tried so many times on 121,9892098920,9890098900 but the reply is same either ur no is activated in 1 hour or contact gallery which I have already visited four times at Chakla,Andheri. Its very very frustating for me that inspite of giving my complaints in writing they are not taking it seriously and the problem remains unsolved. Please tell me is there any way to lodge a strong complaint against Airtel Company for mental agony.... I would like to spread this message by complaining against airtel towards your platform because normal people have no other choices to here and there .