Airtel — unable to do tele verification

Address:

Indore, Madhya Pradesh, 452001

I have port out my Idea number [protected] to Airtel on 02/09/2019. I left india on 06/09/2019 to US. After i reached US i got a text on my alternate number on 07/09/2019 to change the sim and perform televerification. Now i am in international roaming and cannot perform televerification. As there is no network on my phone to call 59059. Every time i try to call it says no mobile network. As of now my number is not working. Seeking help for any alternate way to perform televerification or do it post first recharge.