How do I get the calendar to update on service selection, without having to click the 'check av


I'm trying to get the appointments+ plugin setup to work for a car valeting business. There is only one service provider, but multiple services... I'm trying to get it so that when a user clicks on the type of service they want the calendar automatically refreshes to that services timeslots, but at present have to click the 'check available times' button. Any suggestions on how to achieve this?