Hi there, pafan. I am sorry to hear about the trouble you're experiencing with your internet connection, I know how frustrating that can be. I would really like the opportunity to assist you with getting to the bottom of what is causing the issue. There is a long list of potential contributing factors. You're welcome to either post your modem logs/stats as described here: https://forums.xfinity.com/t5/Your-Home-Network/Xfinity-Internet-Connection-Troubleshooting-Tips/m-p... or you can send me a private message with your name and I can look up various diagnostics for you. Thanks!
I ended up not hearing back from you on this, pafan. I went ahead and completed this interaction. However, you are more than welcome to continue with sending me that PM if you do end up needing further support with this. Thanks!