User blog comment:BlueGrazeDazeMaze/My Roblox Account was terminated in 2015. Im getting it unbanned./@comment-26126721-20181023194153

You're responsible for all action under your account. If you got banned for scamming by someone getting into your account, it's your fault for not having enough security on your account. Roblox will not undo your ban for this. Although if you want to try anyways, send an email to appeals@roblox.com telling them your username and why you want to be unbanned.