If you want to apply your Volotea Credit for a new reservation, make your reservation from your User Profile and in the payment page you must select the option to pay with Volotea Credit.
If your Volotea Credit does not cover the full amount, you will need to pay the difference using another form of payment. Remember that there may be extra charges depending on the chosen payment method.
If, on the other hand, your Volotea Credit is more than the cost of the reservation, only this amount will be used and the remaining credit will be saved in your account.
Remember that you cannot use your Volotea Credit to buy a flight having a promotional fare.