Verizon is discontinuing their text app!?

A little bit ago I got a text from Verizon saying that they are going to be getting rid of their text app! Texting is a major part of using a phone, how can they just get rid of this!? This is all I use my phone for! 

The message says that if you want to keep all of your message history and be able to continue texting people, you have to download the Google Messages app! Since when does Verizon have anything to do with Google for texting?

This is a problem for me because I cannot add any more apps to my phone, I don't have any more space. I went to Verizon a few months ago and asked them to put in an SD card so that I could get more storage space, and it didn't work. They told me that my phone is so old and cheap that it literally doesn't have enough storage space to operate correctly and I can't even add storage space to it! They literally told me the only choice I had was to upgrade to a new phone. I don't have a job and it's not looking likely that I will have one anytime soon, so I cannot afford a new phone.

I have no idea what to do about this, is anybody else upset about this?