Unable to use T-Mobile Home Internet with work VPN, any suggestions?

Sixteen, you’re very lucky to have received that new modem!

T-Mobile is refusing to give these out. They also do not have any way to know which stores have them. Per one of the bazillion reps I've spoken to it (new modem) is the ONLY CURRENTLY available fix for this problem. Otherwise you get to hear "the engineers at Citrix and T-Mobile are currently collaborating to try and fix the problem. That ticket was made exactly a week ago today. 
I feel incredibly sorry for the rural folks who have no choice. Fortunately I dwell in a large city and have a multitude of options but I am royally PO'd that I have to go through the hassle of changing two phone lines, plan and internet provider because T-Mobile cannot get their s together. 
For those of you being told it's your company- it's not! Call back and get a rep who knows what they're talking about. It is specifically an issue between T-mobile's old (black) modem having plunked out on those of us who use Citrix Anytime VPN, plus a few other VPN's here I haven't heard of. 
The only glimmer of hope for those of you w/ no choice is to try connecting via your phones hotspot. That's the only thing that has kept me from going utterly mad. It works but can get spotty if it's disconnected so just know that. I'm shocked in 2024 that we have companies w/ this bad of tech! Totally shocked and disgraced. I do not use X (Twitter) but those of you who do send messages to T-Mobile's CEO. That kind of thing works. Name easily found on the internet. For those who intend to stay and try to struggle it out you're going to have send these messages on the regular. Best to you all!