How do I unlock Hard mode?  

Clear a tour in Normal mode by earning 3 stars in each match. When you have earned 3 stars with each match in Normal mode, this will unlock the tour in Hard mode.

How do I unlock Hell mode?

Depending on the tour, Hard Mode may have different requirements to compete in each match that will unlock your access to Hell mode.

For The Road tours, you may need to reach certain League levels to unlock Hell mode. You'll need to complete League tasks, diversify your roster and level up to compete in these more difficult Hell mode matches.