My appeal just got invalidated for no reason.

Hi fellows,

I recently discovered that my account is steamrep banned because I guess the admin suspected that my steam account is an alt of my ex-friend's account, which is banned for scamming.

I explained the situation about why I broke ties with my ex-friend(racist and toxic individual) and stated specifically that my account is not associated with his account. However, an admin simply invalidated my appeal and said "Invalid, can only appeal with originally tagged account."

I don't understand what he meant by "Invalid, can only appeal with originally tagged account" and I'm not sure how to even appeal at this point. My heart is hurt, knowing that people can just falsely report my account and get it SR banned.
I need help reinstating my innocence. Anything helps. Thank you.