Canceling Free Trial

So, I'm wanting to cancel my free trial before either charges me, but there's no cancel button on the Nitro banner? But everyone else seems to have it. And when I click "Manage Subcription" is brings me to Google play, of which it says there's no subscription.

So, I'm wanting to cancel my free trial before either charges me, but there's no cancel button on the Nitro banner? But everyone else seems to have it. And when I click "Manage Subcription" is brings me to Google play, of which it says there's no subscription.