You should see a message saying "You have  x FREE WOF SPINS. Play them here!" on "Free BTC" tab.

Spins there are cumulative and can be used anytime you wish by clicking on the "Play them here!" button above. Usually daily spins don't appear in real time. There is a long delay, so it might be the reason why you aren't seeing yours yet. Try checking it later or on the next day and you will see your fresh spins will be there.