Minecraft account details are gone?

I wanted to play Minecraft today, but the launcher needed an update. When this was done I had to log in again, but my email and password were wrong, even though I tried all combinations of my emails and passwords. I can't get my account on minecraft.net through Microsoft either. Is there a way to get my password and email back or at least transfer Minecraft to another account so I don't have to buy it again?

Try to reset the password by clicking on https://www.minecraft.net/...rd/forgot/.

I've already tried it. If I enter my email there, nothing arrives. I have a different email or something for some reason.

Then create a new support ticket and enter an email and the transaction ID (which you can hopefully find on PayPal or in your email inbox):

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

How is the transaction ID structured? Is it made up of letters or numbers?

Yes. Here you will find more information:

https://help.minecraft.net/hc/en-us/articles/360029977371-What-is-a-Transaction-ID

Then unfortunately I don't have them anymore. Is there any other option?

No, apart from the options just mentioned, there are none.

Okay, thanks anyway.