5G home internet keeps dropping

It’s a shame Tmobile has fallen into the trap as all the other cell providers, gain a huge market share and stop helping customers. 

I have a Nokia trash can modem and had issues on day one, wouldn't connect to 5g, was sent another modem and it worked for maybe 8 or 9 months and i was very happy with it until 2 weeks ago. It too started dropping 5g that could be reconnected with a modem reboot last week that option failed and after several calls to a "Expert" they agreed to send me a new router.  I got that 3 days ago and it too can't connect to 5g, here it is 3 days later , several wasted hours on the phone with a "Expert" asking me if the modem is near a window, does it have a singal bar in the display etc etc.  I am amazed that when I asked to speak to a next level tech I was informed that was not a option.   I called corporate office to ask for a tech number that wasn't a phone bank of scripted people and was patched to another department who once answered sent me back to the home internet helpline and he has very limited knowledge of it. 

As I write this am on hold at 27 minutes to talk with someone.

Maybe tmobile uses text searches so if so Abdul Saad start training your people.