Frequent Disconnection on 5G Home Internet

I've had the t-mobile 5G internet for less than a week now. It works intermittently at best. 
There are 2 locations in my house that get pretty strong reception, but in this short week, I've had to move the router almost everyday to get a signal strong enough that my computer can even connect to it. This is not acceptable service. AND, while most people on this forum say that they notice the most drops in service to busy hours, I find that the service all but disappears during the middle of the night when I'm occasionally woken by my dog, a child or strange sounds during the night. 

I really want this service to work because my prior internet service, while much more stable, was incredibly expensive.