Phone calls and text messages not going thru 12/25

I’m in SE Iowa and perhaps this is another problem that needs to be somewhere else? I don’t have a problem calling or sending messages. But I have noticed, since 12/22/22, the people that have USCellular service have called and wanted to know why I didn’t respond to their text. So, experimenting with four known USCellular customers, they can receive my text’s but I cannot receive theirs. Don’t know why and not sure who to contact about it. I can receive text’s from Verizon and others.