How do I reconnect standalone messenger app to old account?

[Evie_k]

My mother has been using the standalone messenger app on her phone for a while, and recently I created a Facebook account for her, and the standalone app disconnected from her local old phone 'account', and was forced to connect to the new Facebook one on her standalone phone app (it 'logged her out').

So now all her old 'phone based' standalone history is gone, and she wants it back - reconnect to it, as it has important messages from people she is not 'friends with' on her Facebook account. She does not want to use Facebook and has deleted her account, but the standalone phone app, still refers to the newer account, and not her old extensive standalone phone app history.

Is there someway to reconnect to the old account, or at least to find and save the cache, and possibly import the old entries into the new profile? She's on android 4ish from memory.

 

[bkdodger]

Do you see her massages on the app? It should not have wiped older messages ..