Invalid TF2OP Mark

I've Being mark for Self Reping but «The headshooter» As known «My alt account» isnt not my account,
i played Counter-strike for like 8 years, my Steam digit got like 5 digits. So its not self repping because i just move on with my Girlfriend and my step brother is in the same house we are sharing connection, i don't want to be mark in TF2OP and STEAM REP as a scammer or anything else because this isn't true and for now i cant trade or cant even sell something, those mark stop me from everything. Yes i can play or buy games, but to advance in steam community that's a big wall. Sincerely i'm 24 always being a good player never hack, never being reported and if i known that my step brother ask me for something wrong to |Scrap| my rep or stop me to trade i will not do it again trust its not very fun and nice to be mark. if i can do something to erase that and take in consideration my account is not hes alt account.
And By the way Sorry for my English i'm French.

Thank you and my apologize for this inconvenient
Kind regards
Marc-Olivier D. as known as TWKK

Can you please put screenshots? we cannot do nothing without legit proofs.

OP mark, contact outpost