How to get an issue escalated

We have been trying to get our fiber internet hooked up at our new house since January 21st.  We have had 11 phone calls to the support and our area manager, each call has included at least 2 transfers so in total we’ve talked to over 20 people online, done 2 online chats, been to the store 4 times, and have had 4 technician and 2 area manager visits.  The HUGE delay has been caused by repeated mistakes from our local xfinity team.  The first guy we talked to to set up the service at our new house put everything in wrong and had us get equipment for wifi that our house wasn’t even capable of.  It took 4 people to figure out how to undo what he did and start over.  Then the guy who finally cleared the account and started over claimed to schedule a setup date and never did.  After talking to 3 more people and going to the store twice, a guy at the store finally told us we were set up for fiber.  It took six people looking at our account to realize that when the guy at the store told us it was clearly labeled on our account and every person should’ve seen it.  He then told us that our store doesn’t support fiber customers and we’d have to do everything for setup online, but he’d schedule the appointment.  He put the appointment in wrong and had a tech come out who had no idea he was supposed to be doing an install and had no equipment.  When then spent multiple days online trying to get someone to schedule an install.  Again, an appointment was supposedly scheduled but it was never put in the system.  When a tech finally got out here he said there was no power at the road and he’d have to put in a maintenance request.  That was also done wrong and we heard nothing for days until we chatted online again.  Another tech came out and said he knew exactly what the issue at the road was and that we needed a converter for the install but because it had been a month of trying to get the install done at this point his supervisor was going to fast track the problem and get the part delivered as fast as possible and Maintence to fix the issue at the road.  Again, we didn’t hear back for days until our new area manager Matt showed up at our door.  He also said he’d fast track the issue and he and the technician were back several days later.  They showed up only to notice they’d ordered the wrong part.  We were told again that the issue would be fast tracked and we’d hear back in 24-48 hours.  When we didn’t, we called our area manager and he was very rude and told us he’d call us by the end of the day.  That was 7 days ago.  No call ever came and we’ve tried to call him back this week and he’s totally ignored us.  I’ve contacted online support again trying to get some sort of ETA on how long getting the correct part and finally doing the install will take and no one seems to know.  They can’t even figure out if the part ever got ordered.  We are platinum customers that have had xfinity for years and have moved the service to our 3 most recent houses and we are being completely blown off by the team in our area.  There is no sense of urgency at all to fix a mess the company has created that has left us waiting on our internet for 6 weeks.  A basic install should never take this long.  This is the worst experience we’ve ever had with any company and I need to know how to escalate this issue and either finally get it resolved ASAP or drop the service because our long time commitment to the company clearly means nothing.