Iphone X - Stopped Receiving Twitter Texts

Hi,

About 2 weeks ago I stopped receiving texts from twitter in the messaging app. I haven't changed any settings on the phone or twitter.

I was wondering if AT&T blocked them because I was receiving a few thousand a month. I have googled and have searched for answers but haven't found anything yet. I am not talking about the twitter app but the text message app from apple. Any help would be appreciated.

Thank you