If you are facing issues with purchase of Avaz India (Android from the Play Store), you can try the following options:  

Links to purchase Avaz India (Android) app through Razor Pay option

Click the links below, depending on the type of Subscription you wish to purchase: 

Buy Monthly Subscription 

Buy Annual Subscription

Buy Lifetime Subscription

You can also access the same links (as given above) from the app too, through the Razor Pay button at the bottom left of the Purchase page, as shown in the screenshot below: