I tried to check but everything in my game is created by myself, I don’t use toolbox or library or etc and for some strange reason
Is that your model or theirs?
Do you have proof that the place can’t be theirs? Stuff like your game’s creation date vs their game’s creation date.
You can try getting the deletion of your game reviewed by Roblox staff. There are many other posts about similar issues that have links to the appropriate email or phone number.
Basically report it like you’d write a report for school. Just remember to use only facts that you can prove and to be as professional as possible. Don’t get emotional and whiny since that won’t help your case.
Try writing a bug report. And appeal as well. Sorry that happened to you
