where to file formal complaint to Xfinity Executive Offices - for 3 hour chat horror when I asked why my home internet keeps dropping

Today I contacted Xfinity to ask why my home internet has been dropping intermittently day and night for past few weeks. My internet has been totally unreliable, drops constantly during Zoom meetings etc. SO - my chat with "support" today started at 12:22pm, ended at 3:03pm. 13 agents. ZERO troubleshooting until the last agent. I want to file formal complaint with the Executive Offices - this is absolutely unacceptable corporate behavior