Airtel — special bundle offer

Address:

Chennai, Tamil Nadu, 600017

Hi.in the name of special bundle offer airtel has promised that who buys a new mi a1 mobile will get additional 20gb every month for 10 consecutive recharged on rs 349. I bought new mi a1 & recharged for 349 but i did not get the additional benefits. E-mailed them regarding this but it doesn't seem like they are working to fix it. Everyday they are calling me and telling it has been escalated to the concert department but nothing happens. It is more than 6 days now.

Attached screenshot of my email and the offer page.

Ph#[protected]