Vodafone India — wrong bill

My postpaid add on no [protected] was not activated. Also i did not make any out call. But after 2 months trichirapalli, tamil nadu. Vodofone retaier phones to day that bill is outstanding. I am a vodofone customer with post paid ph no. [protected] for more than 2 years paying bill amonthly about rs 2000. Now they gave an aa on no.[protected] compelling me. But they did not do any verification nor they did activate. Simply after a lapse of more than 2 months they just phone and inform bill. I am not responsible for this. I have changed to pre paid plan. Please withdraw wrong bill.