Help! Updated lightroom mobile free version to premium and all the photos are gone!

Hi! Today I made a update in my old phone (Android) from my free version of Lightroom to the premium version to be able to backup and synchronize all my photos and pressets to the new phone I bought (also android).

But the minute I made the update to premium basically all my photos from the last 3 years are gone in my old phone (I bought the premium in the old phone to have no problems) If I knew this was going to happen I will NEVER have made the update to premium.

What can I do now? 

I updated to have the security of all my edit stuff and now I have none. (The app recovered only 19 photos and many of them don't even open)

Please, someone can give a light? :((