Received my first response on inaccurate personal information. Equifax removed 1 name, 6 addresses, and 2 employers

So sent a letter from the bot to Jefferson capital last week and I got a letter from them today saying this

I’m fixing my credit so far so good 🙂 never seen it above 450 now it’s 610 but still have more to do !! 🙏🏼 Also wanna fix my brothers credit How can I go about that ? Is there an app I use to fix someone else’s credit to see ther collections ?