I tried to log in to minecraft with my old account on a new computer with my new account...

Thanks for getting back to me, but that isn't my problem, I think my old Minecraft account has been overwritten with a new one when I reset my password.

Something I noticed on a different computer that used to have my old gamertag account logged in. Was that the new gamertag that doesn't own Minecraft said "active", and the old, good account didn't have "active" and when I clicked the 3 dots to open a drop down menu for the account it said "Set as active." but when I clicked that and typed in the credentials for the account it said "welcome _____________" where the blank is the new, bad gamertag. Which brings me back to a point that I mentioned in my first post, my old Minecraft account I think has been overwritten with a new one when I reset my password.

I have tried a lot of things, but I think the only was to fix this is if there is a way that somebody can access my old account and re-establish it as the main one linked to my Microsoft account.

I have also contacted Minecraft support and am waiting for a response.

I migrated my Minecraft account to Microsoft some time ago, and the game on my laptop is the full version, not a demo mode. I checked on both computers, and I am logged in the same Microsoft/Xbox accounts. I tried the "free trial" on my new computer and saw that it was not the full version.

Hi Josef,

Thank you for your reply.

Yes. I have tried both accounts (old Mojang and new Microsoft) to log in on the launcher. Also for both on a fresh install of the launcher. When trying to login on the launcher with my old Mojang account, I get the notification that it has been migrated to my Microsoft one. And logging in with the Microsoft account gives the demo only option.

Next, I checked on my Microsoft account, and there I found that I only have the option to buy a new copy of Minecraft.

Sorry I don't think I explained properly, when I logged in with the linked microsoft account to my old minecraft account, it then created a new account along with an xbox live account.

I have 2 xbox live accounts. I think you have to go to account settings select update, goto email address and change it there. Now what i did was create my new email from a computer then went to xbox live, i logged in old email went to account settings changed
to new emai then logged into my xbox,