It wouldn't have helped if you hadn't, since they've now deleted all non-Microsoft accounts.
Reminder to whomever is reading: if you bought the game during alpha, you have the right to all future Minecraft games and a premium account forever. Microsoft barely tried to uphold this by giving a free Bedrock license to alpha buyers for a limited time several years ago. I suppose you'd have to sue them now if they break it, and the judge will wonder why you bothered to bring a $20 dispute to court.
Reminder to whomever is reading: if you bought the game during alpha, you have the right to all future Minecraft games and a premium account forever. Microsoft barely tried to uphold this by giving a free Bedrock license to alpha buyers for a limited time several years ago. I suppose you'd have to sue them now if they break it, and the judge will wonder why you bothered to bring a $20 dispute to court.