How do I recover old bitballoon projects?

I could access some of my old projects from bitballoon but some of them show that they don’t exist. How can I get them to work? The websites that don’t work are: steven-rocks-1222333344414.bitballoon.com, frenchfryking2000003.bitballoon.com, talklikeapirate235789-10928476.bitballoon.com, fathers-day-1223345678i909876trewq.bitballoon.com, don-t-play-roblox-on-march-18-1345678.bitballoon.com. I have changed it to netlify.com but it still doesn’t work. Please tell me how to recover them. Thanks

I’m closing this as a duplicate of https://answers.netlify.com/t/how-do-i-get-my-bitballoon-websites-back/56774/