Since you've already had a tech visit...
I've asked a Comcast employee to help you. You should expect a reply in this thread.
If you would like the community to help you troubleshoot:
Start here: troubleshooting guide. Please post your equipment details (make/model of your modem/gateway/router) and a screenshot of your signal levels and your error/event log. Thank you!
FYI: They owe you a $20 credit for every tech visit after the first for the same problem.You can also get a credit for your service from the time you first reported the issue until it is resolved.
Hello BGLoscar. I can assist in troubleshooting your intermittent internet connectivity issues. Please reach out to me via private message and include your full name and account primary phone number so I can access your equipment.
Please Note: The X1 cable box has its own built in cable modem that creates it's own internet connection for the box's built in Netflix, YouTube app. Your cable modem for your residential internet provides all your other internet. These devices are typically troubleshooted separately.