Aicel Cheating me

my name is Venkatesh Iam staying in bangalore. I got a Aircel POSTPAID sim card (9066097878) But it is not activated. So i through the simcard.. Aftr a month lot of msgs came to me U WANT TO PAY THE BILL 1109... I also called to customer care and i told tht every thng... Aftr a few mnths ONE madam called to me and told tht SIR PLEASE PAY ATLEAST 800 orelse Police problem will come.. i ALSO PAID by cash One man came and collected, tht lady told your connection is DISCONNECTED... Then aftr few days One lady called me She said tht Calling fmr DELHI CORT U WANT TO PAY THE MONEY ORELSE Police will come and arrest u.... I ALSO AFRAD AND PAID Bal amnt 518rs... <<< THE THING IS " I DIDN'T NOT USE SIMCARD ITSELF""" I thought every thing is overed........... NOW THEY ARE SEND THE MESSAGE "your bill amount is on Due please pay it"...... WHT THE HELL THEY ARE THINKING????????????? I want a explanation........................ if u want to call me CALL TO 8197346558