Airtel — postpaid no. [protected]

I activated international roaming whilst in bangalore and deactivated within 2 hours as the airtel customer care executive confirmed that the charges start only when i land abroad. I have confirmation message receivedthat the international roaming was deactivated whilst in bangalore. I have now been charged for 2 different packs of international roaming and airtel executive gurdeep singh from chandigarh says he cannot do anything and i need to pay. He did not connect meto his senior as well. I will not pay this as i have the proof from airtel that service was deactivated.