We posted a link to a non-official support site that we probably shouldn't give attention to. Anyway, please don't give your information to anyone other than help.minecraft.net.
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my name was changed on minecraft java edition without me requesting it
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Replying to @XboIive
Please send us an email at help.minecraft.net/hc/en-us/… and we will assist. Remember to attach your Transaction ID.

Oct 4, 2020 · 3:06 AM UTC

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Replying to @MojangSupport
I do not have my transaction ID
Replying to @MojangSupport
nevermind i found it