Barcelona coach Xavi Hernandez complained Friday rivals Real Madrid are influencing referees "every week" and said it meant LaLiga was "completely adulterated".
Los Blancos lead LaLiga by two points from Girona and sit 10 clear of champions Barca, down in fourth place.
Real's television channel has broadcast hours of controversial content this season attacking referees.
"I don't like that they are influencing referees and they are doing it every week. I think it adulterates the competition a bit," Xavi, who will leave Barca at the end of the season, told a news conference.
Barca and several of the club's former directors were charged with bribery last year after payments to a former Spanish refereeing chief, Jose Maria Enriquez Negreira.
The Catalan club deny their payments of over seven million euros ($7.5m) were an attempt to influence refereeing.
"The Negreira topic has not helped us at all, and that's a reality - and this is how we have to compete," continued Xavi.
Barca president Joan Laporta said earlier Friday that Real Madrid television's content was "shameful" and the club were not "behaving well".
Laporta criticized refereeing of a recent Real game against Almeria where Carlo Ancelotti's side were losing 2-0 but won 3-2 with three controversial Video Assistant Referee decisions going their way.
"We saw a disgrace in the game against Almeria," said Laporta, speaking to RAC1 radio station.
"And they will say the referees are helping Barca - we are very angry and we don't accept it."
Xavi said he was shocked that Real were allowed to keep running videos attacking officials.
"It surprises me a lot that we allow this, that it's permitted," said the coach.
"It adulterates the competition completely, week after week - even the blind can see it.
"(Atletico Madrid coach) Diego Simeone said it, no? We are not stupid. The world sees it."
Simeone was asked last week about VAR audio clips from Real’s match against Almeria and said officials "think we are stupid, and it makes us angry".
Real coach Ancelotti said he thought officials made the correct decisions at every juncture in his team's win over Almeria.
Barca visit Alaves Saturday while Real host third-place Atletico Madrid in a derby clash Sunday.
