i also said this when it first happned but you didnt reply, i brought java adition dowmloaded it then went on the launcher it still said play demo world and then buy minecraft press on that and it says dowmload it whats going on i really want to play java!
This report appears to be a duplicate of MCL-16570, which was later resolved as invalid because this is an account issue and the bug tracker is unable to help you. Please see the Mojang Studios note attached to the parent ticket to potentially fix this issue.