Barcelona president Josep Maria Bartomeu admits there's great anger inside the club over FIFA's 14-month transfer ban.
Barca have announced they're appealing the ruling.
Speaking to fcbarcelona.com, the president said: "We're angry because we think we're the victims of a grave injustice. It's an excessive measure.
"We have 10 days in which to appeal and we will first notify the appeal committee in writing within the first three days. If necessary, we will go to CAS.
"We must protect children and prevent them from being used as commodities by unscrupulous people who do not seek the best for their future, but instead for their own economic benefit.
"That (the exploitation) is not the case at this club."
