If you can only play the Minecraft demo, it means you don't own the game on that account. See help.mojang.com/customer/por… for full info.

Feb 11, 2015 · 8:57 AM UTC

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Replying to @MojangSupport
my friend got MC 2 weeks ago, she logged in from a new location today, now can only play the demo version
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If you can only play Minecraft demo, please visit help.mojang.com/customer/por… for help. ^EA
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Replying to @MojangSupport
Not even true. My sister and I bought minecraft Aug. 8, 2013. She took a break and now it says she has to rebuy/ only able to play the demo. 😡
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Please have your sister send us an email at help.minecraft.net/hc/en-us/… and we will assist. Remember to attach the Transaction ID. ^RL
Replying to @MojangSupport
i redeemed minecraft java edition yesterday on website. after downloading launcher only "play demo" is available (both accounts are same game redeemed account and minecraft launcher account) please need help
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If you're having trouble accessing the full game, remember to use the Microsoft login option with the account that you purchased the game with. Check out: bit.ly/3R3oNkw for more details on Demo Mode and let us know if you're still having any issues! ^FF
@timbercraftoffi Sorry to hear that. Visit help.mojang.com/customer/por… for technical support. ^AB
Replying to @PriviaPlays
@PriviaPlays Players can change their name every 30 days. Previous usernames are held for an additional week after that. ^LK
@TomarGittens What happens when you try to play? ^LK
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@cookle5678 To help you with this you have to contact us at help.mojang.com/customer/por… ^HN