Poor customer service. I need help!

I plugged in my router and only get a flashing amber light. I went to chat three times now. They run diagnostics. It was determined I don’t have a signal coming in to the house. I was told I had a service technician scheduled to come today to access. I was supposed to receive a notification of that appointment but never got it. Today I looked at my account and no appointment is scheduled. Xfinity assistant says there are no appointments scheduled for me and continually asks what I want to do. Please can anyone help?