What is the best way to echo/display the currently selected service provider and service?

I am trying to use the Appointment+ plugin with the [app_monthly_schedule title="Our schedule for START"] shortcode. I am passing the service provider into the page via the following URL


I just want to echo the currently selected/passed in service provider and service. Do I need to create my own custom shortcode? I do not want to use the drop down menus for selecting the provider and service.