In order for credit to be used for a booking, it must already have been credited to your user account. In addition, it must be valid for the selected service category, must not be reserved for another booking, and must not have expired either at the time of booking or at the time of payment.
If multiple credit balances are available in your user account, the system automatically selects which credits to use. In doing so, we take into account the type of credit, its validity, and the available credit balance. This selection cannot be adjusted manually.