lie from comcast agent

We changed out our wireless router and when we went to bed at 11 pm it was working. In the morning it was not working. We talked with an agent and nothing was resolved. They said they were having a tech work on it and would call back. They did not call back when promised. I left a 0 on the satisfaction rating. As soon as the rating was sent in, they called me back right away and promised to send a tech out this morning between 8-9 am and that they would waive the $100 fee and give me a $50.00 credit if I would change my rating. I changed the rating and this morning the tech did not show, when I messaged the virtual agent said we do not have any appointments scheduled. This afternoon, I will be switching companies. Xfinity does not seem to value long standing customers who pay over $300 a month for thier services.