Two different games of the same game?

You're welcome, in that case the previous link would work for you!

By data, do you mean worlds and access to it?
If yes, nope
The worlds will remain stored in your computer

You can check this tutorial in case you want to know how to find them
https://www.ubackup.com/articles/how-to-backup-...

To fix the demo problem, you can give them the second transaction ID, in that way they can look further on your account and activate internally the game for your

** This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.

sorry if I'm still bothering you, but there was a problem with the refund. Although the support said that they would only cancel the first transaction, as of now, I no longer have access to minecraft, in fact the launcher tells me to play the demo.

Now, I have again contacted the support for information on the subject, but my interest is more focused on the data. So I wanted to ask you, always in case you could answer me, if the data is permanently removed when the game is refunded

Thanks for the quick answer. In fact it was my fault, given by the fact that I entered "Minecraft" and not "Minecraft: Java edition" as the title.

Thanks for the update
In this case as you purchased the game via Minecraft website and the order doesn't appear in your Microsoft account order history, you may need to proceed submitting a ticket with them here:

https://help.minecraft.net/hc/en-us/requests/new

*select Refund support*

Don't forget to attach order/transaction ID in your request ticket