Airtel — mobile not activated after so many follow ups

My prepaid mobile number [protected] had not been working. I had been in touch with the customer care and had contacted them many times.. I was not getting any feedback or support from them. They finally advised that i have to visit any of the air tel showrooms, for which i had visited. One showroom was in kakani towers nungambakkam. I was told my sim has to be replaced for which i had paid the cash to them and they had informed that it would be activated in 4 hours. But it was not activated. I went to another show room in perambur and they said that another new sim has to be installed for which my wifes presence was needed. I brought my wife and when they browsed. Then they said that the process is on and it will beactivated latest by 24 hours. Till now it is not activated. I had contacted [protected] mobile number and he told me the same information. I wish to inform you that i have been inconvenienced and air tel is not taking any steps to rectify my problem