Tmobile Home Internet with Tmobile Cellspot

So, like others I spent about an hour on the phone talking to TMobile after my last post. The only thing that I got out of that is that TMobile hires absolute imbesiles for their home internet support team. To anyone with an ounce of technical understanding, you can see why having a gateway wirelessly connected to a transmitter which is hard wired to itself is not going to work. After describing the issue calmly and as elementary as I could numerous times, I was met with responses that made it clear she had no idea what was happening. (I think she thought WiFi and Internet are interchangeable/dependent terms? She couldn't understand why if I wasn't losing wifi, why I wasn't able to connect?) Very frustrating exchange. I'd say it was like explaining to a kindergartener what the issue was.but then for fun I explained it to my 5 year old after the call to see if I wasn't doing a good job and she understood first try..... Finally talked to a supervisor that was odd at best. He assured me that he would use "all the powers he holds as a supervisor" and employ "the very best Engineers in the company" to fix the problem. Thought we were getting somewhere, then right before he hung up he told me a work around would be to turn on tethering on my cellphone and connect to that. 🤨 Sooo... probably still lost then?