Modem stopped working after a week of activation

All day today the modem hasn’t been working. No internet connection it states on the app and i have followed the app reccomendations through xfinity assistant and nothing has worked. I have unplugged the modem to reset it allowed time to go by and then the modem begin to have a blinking orange light and then lastly aolid orange light the app tells me to schedule for a tech to come iut and take a look at it but it was telling me that i would be charges $100 fee. I decided to call it in and speak to technical support for troubleshooting assistance. They made me do the same thing and the representative didn’t seem to know what she was doing because her answer to everything was i dont think so. Lastly after 40 min on the phone she told me she will schedule got a tech to come out to my location. I explained that i shouldn’t have to pay for a tech to come out based on the internet worling fine for a week and now all the sudden the modem doesnt work. She stated that i wouldn’t be charged for the tech i then receive an email stating that i will be charged for the tech. This doesn’t seem fair and I shouldn’t have to pay for faulty equipment. This is seeming more like a scam to get more money than anything else. Someone please take a look at this. This is ridiculous. I even tried to connect it to another coaxial cable in the home and nothing worked which makes no sense i believe it could be an equipment issue or anninternal issue with xfinity systems but someone needs to take a look at this and solve it immediately. I shouldn’t have to put up with this. If this is the service you provide i might as well cancel the service and return it being that i am within the 30 days of initial installation.