If you don't have access to your old email we can verify you as the owner and work to assist you with changing it! Have you submitted a ticket upward? ^Tk
In this case, you'll need to contact Microsoft Support for assistance in recovering your account if you don't remember the credentials: msft.it/6018b3Jyn ^TK
If you are needing a refund on one of the purchases you will need to get a refund from Playstation Support. We are only able to assist with refunding Minecraft: Java Edition. ^TK
If all of your Worlds got corrupted then unfortunately there is nothing that we're able to do in this matter. If you had one backup that worked you could upload that to see if it helps. ^TK