Sergio Perez is not impressed after claiming some team members have started to "hide things" from him since it was confirmed he will lose his Racing Point seat.
Perez was informed ahead of the Tuscan Grand Prix this month that he would not be kept on for the 2021 Formula One season.
Sebastian Vettel will replace the Mexican at a team that will become the Aston Martin works squad next year.
Perez does not believe his relationship with his employers will be affected for the remainder of this season, but he has made fresh claims about how some colleagues are going about their business.
Asked if he thought relations would change between himself and Racing Point, he said: "I don't think so. We are focusing on the races ahead.
"Obviously since the news came out, some people inside the team tend to hide things, which I don't think is great. I think at the moment, we just have to be as transparent as possible, to make sure we achieve our goals and make sure we score as many points as we possibly can.
"It's going to be so crucial that we deliver every single point. It's very important for the constructors' championship.
"We still can have the best season in our history, you know, if we manage to finish third, and we're all going to be very disappointed if we don't get that third place in the constructors' championship."
Perez refused to go into detail about how he was told he would not be kept on, following reports he heard team owner Lawrence Stroll talking about signing Vettel through a hotel room wall.
He said, quoted on the official F1 website: "I'm pretty disappointed to be honest that such things have come out from the team.
"I think those things have to remain between the team and myself and I won't be giving any information at all, because I think it's something that has to be kept internally."