No Coverage in Inspirada Community in Henderson, NV?

I have lived here in Inspirada for 12 years, it has been like this the entire time. I tried calling about it multiple times over the years, and no one at the customer service line knows anything nor can they help. I tried calling again today to see if I could talk to anyone about what T-mobile's plans are for our area. Customer support could offer no help. A few years ago T-mobile did send us a cell phone booster device, which just piggy-backs off our Wi-Fi, but my coverage is terrible outside of the house when I go to run errands. At a nearby gas station I see a huge cell tower. My neighbors who don't use T-mobile seem to have no problem at all. So, obviously the other carriers care about covering our area. I have made the decision to change carriers. I suggest everyone else do the same. T-Mobile does not care about our area. And it is apparent to me that T-mobile is not going to do anything about it.. I've been with T-mobile for a long time, and I like the company, but if T-mobile is incapable of providing the service I expect at the quality I require, I'm just going to have to find another carrier.