I'd like to cancel an appointment with a technician

I scheduled an appointment a few hours ago for a technician to come out later this week, then realized I no longer needed them to come out. Annoyingly, I can't seem to cancel the appointment. 

When I try to manage the appointment in the app it brings me to xfinity assistant who tells me my appointment is confirmed then asks if I need help with something else of if I'm "all set".

When I ask xfinity assistant to cancel, it just tells me my appointment is confirmed. Then, infuriatingly, it asks if I need help with something else of if I'm "all set". (The answer is neither by the way).

When I get on the computer and go to the website and click "Manage my appointments" it only gives me the option to reschedule, no option for cancelling to be found.

This is seriously irritating, why does this need to be such a hassle?