Ok, here it goes.
I have an existing nhl.tv account. When I try to purchase a plan, it asks me if I already have an account. I say yes. When I log in, it pulls up old information including an old billing address. There is a button to edit the billing address. I hit the button and I populate the new address information BUTTTTT, there is no damn submit button. So when I try to pay, the payment fails... most likely because the card does not match the old billing address. It is so damn maddening... especially because I hate even doing this considering half of all the games will be on a blackout or national broadcast.
Have you tried this on multiple browsers? Have you tried on different devices?
If you're using a tablet or cell phone (mobile device), go into your browser options/settings and switch to 'Desktop Mode'...