I notice you're syncing tasks every minute. Perhaps a short-term workaround is to sync every 2 or every 5 minutes while you wait for the quota to increase?
For premium users sync every minute.
Use Indian payment gateways if possible, though Paypal works fine too.
This is by far your easiest and clearest path to monetization, at least that I can see. And it seems you're long overdue for monetization.