I'm sorry to hear that. If only the demo mode is accessible, or asks to pay again, this means that you're logging in with an account that does not contain a Minecraft profile/username. Please visit help.minecraft.net/hc/en-us/… for a list of possible solutions.^SJ
Sorry about any delay you're encountering! We try to respond to tickets as quickly as possible in the order they were received. We appreciate your patience!^SJ
Wenn Sie glauben, einen Fehler gefunden zu haben, besuchen Sie bitte bugs.mojang.com/secure/Dashb… und melden Sie ihn, damit die Entwickler ihn sehen können. ^SJ