Airtel — invalid charges deducted for roaming

Address:

L-41, 3rd floor, lajpat nagar-2, New Delhi, Delhi, 110024

In travelled to USA however, got roaming activated for 3599/- that is fine. However, customer customer says that roaming for 3999/- was not deactivated. See the message received for both activating and deactivating. Kindly reverse 3999/ roaming charges asap. Have spoken to customer service but no response. Have mailed since 12/8/2019 but no response. My Phone number is [protected]