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

I believe it might be time for a class action lawsuit against T-Mobile for raising rates on a promised fixed rate, never to change, Magenta 55+ plan. I realize that T-Mobile has incurred additional expenses as they say but if they think that this plan was a bad deal for them then I'm sorry to say that they made their bed and must lie in it (no pun intended for the lie).They are the third largest cell phone provider in the nation with 98 million customers. I don't know what share has the Magenta 55+ plan but I'm sure it's a lot. Please let us know if we have support out there. We mean no harm to T-Mobile but they have certainly harmed us as we incur additional expenses in our lives as well. ¡Gracias!