T-Mobile breaking promises to seniors who were offered price-lock guarantee for life on 55+ rate plans

I filed a complaint with the FCC. Thank you to the person above who suggested that and provided the link. I just received a form letter from T-Mobile. See attached. It is quite remarkable how they are trying to deny ever having made the claim, and conflating a different offer called the "price lock" which they say was offered in April 2022 through January 2024.  I have a very clear memory, as many of you seem also to have, of the 55+ plan when it was first announced in 2017 with a "guaranteed price for life".

I just can't believe that nobody has any documented evidence of this promise that was made when we signed up. I I did some initial searching on the Internet way back machine (https://web.archive.org) but I was not yet able to find anything. 
 

I think overall T-Mobile is a pretty good company, but it does seem like they are in breach of contract here, and it seems like they should be called on it. It does seem like things may have changed since John Légère left.