Internet constantly disconnecting all day

For the past several weeks, internet disconnects intermittently throughout the day.  It took quite a bit of time to finally get a technician to come out and when he did two days ago, he said it was supposed wrong outside of my home.  Mind you, Xfinity was supposed to have been in my area a few days before that making "improvements" but the disconnections on my internet are still occurring.  The technician gave me his supervisor's phone number to call and gave me a ticket number for the supposed escalation of my problem, but I've heard nothing and the supervisor does not answer his phone nor has he given me a call back.  I am a long term customer of Xfinity and would like to continue, but the lack of good customer service I have received (coupled with intermittent wifi service even though I'm paying my bill), I feel the only recourse is to discontinue my service and go with another company.  Not sure how to find out about my service request and whether someone is working on it.  Extremely frustrated!