T.F.
I've never needed to recover a deleted text.
If I were to need to, my first go to would be ATT because they are the provider for my IPhone.
I know there are ways to do it because authorities do it all the time when investigating cases. I just don't have a need so I never checked it out.
FYI, for the future.... If I have a text I want to make sure I do not delete, I will screen shot the text and save in my camera roll and/or click on the chat boxes, highlight the text I want to save and email it to myself.
Good luck.