When a free bet is awarded, there’s a notification as seen below. Click on the notification to see the free bet details.

The free bet amount is indicated as reserved balance

When qualifying bets to use the free bet are added to the bet slip, click on the free bet notification and select the free bet.

This automatically loads the free bet amount in the stake box of the bet slip.

If bet placement is attempted without meeting the wagering conditions of the free bet, the bet would be rejected for that reason as seen in the image below. If all the wagering conditions are met, bet is accepted.

Bets placed with free bet can be seen in bet history with “free bet” indicated on the bet.