Reporting a tracert/routing table issue to Comcast

Hello.  Is there a system available to report issues that are clearly outside your home??  I have been able to remote access my work computers via IP address for years now.  Now, they are unreachable and tracert reveals there is obvious failures.  To work now, I have to disable my ethernet connection and then connect via a hotspot connection to my cell phone, which has wifi disabled.  And yes, I've called Comcast, reset my modem/router a dozen times, all to no avail.  Please help.

Thank you!