Barcelona president Josep Maria Bartomeu said on Tuesday the club has terminated its contract with a company accused of criticising current and former players, including Lionel Messi, on social media.
"This morning I personally gave instructions terminate the contract," Bartomeu said at a journalism awards ceremony.
According to Spanish radio station Cadena Ser Cataluna on Monday, Barca hired PR company, I3 Ventures, to improve the image of Bartomeu and the club's board online.
The company oversaw "dozens" of accounts attacking the likes of Messi, Gerard Pique, Xavi Hernandez, Pep Guardiola and Carles Puyol on Facebook and Twitter.
Among the messages the report cited is one expressing anger towards Messi for his delay in signing a new contract and another questioning Pique's involvement in the Davis Cup.
In a statement on Monday, Barcelona denied that it was behind the messages and Bartomeu reiterated that stance on Tuesday.
"Barca has never hired a service to discredit anyone," he said.
"Not a player, not a former player, nor any politician, manager, president or former president."
Bartomeu added: "That is flatly false. We will defend ourselves where necessary on this issue, by all means."
"To the question: Have we commissioned to discredit people or institutions through social networks? The answer is no and we will take action against all those who accuse us of that."