Internet runaround

I have been with AT&T for 14 years and have had a grandfathered unlimited choice plan for my home internet for the past year as I live in a very rural area with no cable or 5g access. 

A month ago my wireless internet started to go out most of the day.   Two weeks of "troubleshooting" with AT&T phone support I was instructed to "bring the box to an AT&T store and they'll fix it".  🤣 They looked at me like I was nuts.  They didn't know anything about it, but could sell me another one, oh, except that it was unavailable until October.  "You can use a different brand hotspot", they said, like the Netgear MR1100 they had on display.  Except they didn't have any of those either. 

So I get one delivered the next day from Netgear.  Hook it up, no internet connection.  One week of calls to a dozen different AT&T support people, to find that "oh, your grandfathered plan isn't compatible with that device.  You'll have to switch plans (and pay $900.00 per month extrapolating from past usage) or get another Netcomm".  So I get a refurbished one from Amazon, and still no internet.   Now I'm told that my plan isn't compatible with that device either. 

That was a week ago.   Nine "support" people and 20 hours on the phone later,  I get "we have a case set up for you (the third one) to make your old unlimited plan work with your netgear".  It'll be resolved 9 days from now.   

I said get me a temporary plan so I can at least have internet access.   Over two hours straight on the phone and they are "just about there", and the call gets dropped.   Another hour on the line and I tell them just get me a plan so I can have internet. 

All told I've been without intent for over a month, and have dealt with 35 different  AT&T "support technicians" for around 50 hours of my life that I won't get back. 

They're telling me I'm back to the $900.00 plan.   We'll see about that. 

Oh, and still no internet. 

Anyone else encounter this issue?