This has happened to me last year. I made an adventure time game that was rpg and it got over 98k plays. I was making the 100k play celeberation event, then took a break and come 2 hours later to see that my account is deleted!?! I tried emailing code.org support and i sent the email 8 times and got no response.
I ended up making a new account but i thought i wouldnt be successful again.
I was gonna remake the game but it ended up turning to a undertale sandbox-fighting game.