Clarins offer add on treatments but currently we are having to not offer them as bookable online as customers try to book those on their own due to the low value then kick up a fuss with customer care when the spa manager tries to cancel/change the appointment. What we would like to do, is advertise the add ons but make them only bookable if a full length treatment is booked. Can this function be made possible, so I can set these up in the settings to only be booked with...treatment 1 treatment 2 treatment 3 etc...
