All of my content is missing.(Marketplace seller)

I also waited too long. Now, trust in EpicGames is about to collapse. You say the Google system is broken, but you have adopted it, started the service, and has been operating well so far. If there is a problem with the service because the Google system EpicGames chose is broken, Epicgames should take the same responsibility. And to prevent this from happening again, you have to spend money and time to reorganize the system as a whole or build it on your own and be independent of the use of the Google system.