"I am outraged by what happened in El Clasico. Barca and Real Madrid do not play with the same rules," Barcelona Vice President Rafa Yuste said.
"I'm not a guy who complains at all, but we have to say enough. There were 36 cameras and the one that was most visible failed.
"Everyone saw that it was a goal and we are going to defend it until the end," Yuste added.
Lamine Yamal's 28th-minute effort in El Clasico continues to generate controversy from the Barca camp as they strongly believe they suffered a robbery by La Liga over the disallowed goal.
Barca are still preparing to drag the matter to court to force a really of the game after they lost 3-2. Real Madrid were also awarded a controversial penalty in that game.
That defeat means Barcelona are now 11 points adrift of Real Madrid in the title race with 18 points left to play for. It means Real Madrid could win the league with two more wins and a draw.
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