Double accounting? Minecraft / Mojang fusion with Microsoft causes loss?

I have the following question or the following problem: /
I bought Mojang my account over my .naturally… Standard E-Mail… Some time later it came to the possession of an XBOX One and I bought there again MineCraft over my account (of course with microsoft over my… Ja E-mail was registered) So now proud owners of 2 minecraft play… And on the edge xD yes on google I've also synonymous xD
well, yes, everything was okay and then came win10 and the verarsche available for me… Have you bought Mojang Minecraft you can unlock today under the google (Microsoft) account your win 10 version. On Xbox I had a subtle other gamertag than aufm pc both but both run on the same e-mail I come only in the Xbox character pure.

does anyone know if you can split it again by another e-mail address?
and what do I do if the e-mail is blocked from an old account? Mojang does not allow e-mail to go to xD without confirmation of said blocked e-mail address

Write Mojang support, they can.

I also had two accounts running parallel on Amazon on the same e-mail for years. Depending on the password, I then came in one of the two accounts.