Poor installation service

I am very surprised by the poor service I have received to date from Xfinity. The technician who first came couldn't get the service running and said he had scheduled an appointment, but never did. He also told me not to feed back on the post visit text message, because he said that another technician would come and only then should I provide feed back. Now I've had to schedule another appointment myself. There seems to be no history of my prior appointment in the services system.