Microcell replacement

I have been a customer with at&t for 20 years. We moved into our house 12 years ago and our cell reception was pretty much non existent. I called at&t customer service, they looked up my area and how far away the nearest cell tower was, it was almost 3.5 miles away. They offered a free microcell and I was amazing, but they did away with them when they went to 5g. I just saw a post about how at&t was suppose to send us a free replacement for our microcell when it stopped being supported on 5g, they never did, our phones cannot receive calls and I have to reset my phone each time I was to send a text message. I call customer service and was told I had to purchase a cell booster for over $200 and one representative actually told me to switch carriers if I didn't want to buy a booster and that they no longer supplied them for free. I also have 3 phones on this account, all purchased at the same time, 1 is showing paid off and eligible for an upgrade and the other 2 have balances owed. I'm not sure if at&t messed up but if 1 is paid off, they all should be, they were all purchased at the same time. I've never had this problem before with at&t, they have always provided me with excellent customer service but recently they have been less then helpful. has anyone else experienced any of this? any suggestions on what I should do?