How do I get appointments+ buttons to mobile responsive?

I have Studiopress balance theme using Appointments+ plugin.
Site URL: https://yourlocalgreencleaners.com/store/products/residential-green-cleaning-service/

When viewing site on iphone 5c:

the "show available times" button under the service providers area, is cut off on right side.

after selecting a date, the available appointment times are cut off on right side.

the "Next Month" button is cut off on right side.

the "Please click here to confirm this appointment" button is cut off on right side.

Is it possible to make corrections so that the buttons are viewable or is it possible to align the buttons and related content under another element?

Thank you