Appointment cancelled by tech

I finally got comcast to agree to send a technician out after months of internet issues. I pay for 1000mbps internet and for the better part of a year have dealt with lags and often the real speed to both wired and wifi devices being closer to 30mbps download and 7mbps upload. After months of being told to restart the gateway and "all is fine," I finally got someone competent to realize that speeds go back up after restarting the gateway and ten minutes later immediately fall back down. So of course things show up fine on their end. Meanwhile I have to restart the model multiple times a day. Even when the useless Xfinity App Speed Test says I am getting 116% of my internet plan. But when I test my speeds across three different internet speed test providers my download speeds averaged 22mbps and upload was 0.5mbps ten minutes after a restart!!!! All the while paying for gig internet. Ridiculous. 

Well, the big day came. Today I was supposed to receive a house visit by a technician. But Xfinity being Xfinity, decided to never contact me directly even after verifying that my number was the contact number. Instead, they contact the secondary account person who is away on business. We both contacted xfinity to ensure that my number is the one the tech uses to notify of their arrival. Still, we don't trust comcast, so we are both on alert for a phone call. Secondary user is on a business meeting and misses the "technician arrived" text, and a prompt cancellation of appointment notice follows five minutes later. Never received a call. After the initial appointment verification text, I never received another message of any kind from Xfinity, actually. 

How is this acceptable business practice? The time of the appointment made me change my afternoon plans and also eliminated any possibility of going about my life in the morning because what if by chance they show up on time and I am not home? Whole half of a day thrown away by incompetence. What else could we have done to ensure proper communication on the company's part? How is this acceptable that an appointment is cancelled without any additional effort to keep it? How is the primary number on the account not the one contacted? How is it that I make the appointment, I verify that my number is on the ticket, and still I get zero messages? How is it okay for your application to constantly lie about internet speeds by boosting them during a test and throttling them back after? How do you cancel an appointment without even trying to contact the customer directly outside of automated systems?

This company does not care about customers.