Bastia striker Brandao was caught on camera assaulting the PSG midfielder after their Ligue 1 clash on August 16, leaving Motta with a broken nose.
The Ligue de Football Professionnel (LFP) subsequently sanctioned Brandao with a ban until February.
"The Appeal Committee of the French Football Federation today confirmed the penalty originally imposed by the Disciplinary Committee of the LFP against Brandao," read a statement on Bastia's official website.
"The Brazilian striker remains suspended until February 15."
Brandao's actions were widely condemned, with PSG president Nasser Al-Khelaifi stating that the striker should be banned from playing football for life.
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