Mojang to Microsoft transfer

I don't know if I am in the right place to ask this, but right now I am desperate.

So I've had Minecraft Java Edition for almost 10 years now. Recently I transfered my Mojang account to Microsoft completely, but when I open the Minecraft Launcher, it says 'play demo", as if I haven't bought the game.

I have tried everything, unsinstalled and installed again, connect my Microsoft account, connect my old Mojang account (it did not work because i completed the transfer), and Microsoft support will not help me.

Has this happened to anyone?