Argo subscription canceled automatically

I have already paid for Argo subscription but it again asking me subscribe while trying to re-enable. I was disabled it for sometime and trying to re-enable it. How can I subscribe again as it is already subscribed and payment was also done.

That fee is per enablement and per month. You have to pay that again.

That’s very bad system. Why this will happen if I am on the same account and why could I pay twice for the same service? I will never use Argo in future.

Then don’t, no one forces anything. The reason may be simply that they incur costs for enabling it and it’s 5$, wait for the rollover of the month and enable it, counting as a new month of service.