No, there is no way to get unbanned from Roblox. The only way to get back onto Roblox is to create a new account and start over.
Temporary bans for Roblox are typically a few hours to a day.
Roblox has a policy of banning players for inactivity. Players who go inactive on Roblox will be banned and not able to log back into their account for a certain amount of time. The length of the ban is determined by how long the player has been inactive.It is important to note that players who are banned from Roblox can still access their accounts through the use of a different device or email address.
If you are banned on Roblox, you will not be able to access the site or play any games.
