@MojangSupport I've had a Minecraft account since 2011 and I recently migrated it over to a Mojang account a couple of months ago and I could play the game. However, I only have access to the demo version now and I haven't gotten any information back on receiving the new version.
Please send us an email at https://help.minecraft.net/hc/en-us/requests/new … and we will assist. Remember to attach your Transaction ID. ^JR