TECH DIDNT SHOW UP yet marked appt completed

Hi.  I am customer x 20yrs & pay $400/mos. Our cable &Internet went out 5 days ago during storm.  We waited 5 days for appt with NO INTERNET OR TV. I have screenshots for proof of email confirm and app confirm 1-3pm slot. Even called to confirm during appt window and told tech was still set to come.  Yet they NEVER came!! So I called again & was told NO record of appt or my calls.   Then called another agent and told it showed tech  marked appt complete!! This was a LIE.   I am told I cannot get new appt for 3 more days. THIS IS AWFUL.  How can I make written complain so executives know this is occuring?? 

I see similar complaints on internet/forum.  TECH NEEDS FIRED for this. Im guessing they do it often without repercussions. My Calls go to out of country call centers that they claim they have no way to contact USA managers or dispatch.  I know there is record  of truck locations to prove this tech NEVER came. We customers deserve to know we can trust Xfininity and cannot be dupped like this after waiting 5 days and taking off work then sitting for hours to wait for tech only to have them DELETE APPT. While being in desperation WITHOUT INTERNET OR TV X5 DAYS. Then put at end of line again. How can we trust next appt. We had to go to nearby hotel for work WebX mtgs for over 5 days now.  

PLEASE HELP.  This is sooo wrong that there is nowhere to go for direct access to hold anyone accountable for this or anything at this company that holds so much power over our lives.  We are forced to be reliant on internet for our jobs, and all doctors appts, news, etc!! 

Ready to go send footage of this dupe to local atlanta news and post on internet. And change to AT&T even tho it will be nightmare to do.  I know comcast wont care if lose me.  But this is horrible if you let this occur.

Grateful for reply asap.