If you ask me to give advice from my personal side then I will say start fresh without using these alts and don't do any copy posts and AI posts, come forward with your own genuine talent and you will see that it will not take much time to move forward.
Ironic thing is that this user can't do that because this will be considered as a ban evasion, if this account is finally banned which I think will happen since the plagiarism is much and now obvious to all