Good signal/bars but no network connection many times daily

My family and I have been having this issue since October 2022! T-Mobile worked great for us until then. We live in an area that shows full 5G coverage. I've made multiple calls over the months. I was told we can get refunded for the number of days the service hasn't worked, but only one time. Being that it happens for a few days to weeks at a time, then shapes up, then acts up again, I'm hesitant because I'm up to over 100 days of not being able to use our phones. Live in Central Texas, everyone I know with AT&T and Verizon always has working service. T-Mobile only keeps us right now because I can't afford to pay off 3 of the lines that are getting paid through a monthly credit promotional. Funny how the "uncarrier" with "no contracts" does their discounts and promotions in such a way that it's essentially the same thing as a contract. Was camping this past weekend out near Ft Hood, and sure enough, only the T-Mobile members had no signal. The world's leading carrier isn't doing a great job right now.