F1 World car gets slower the higher the tech level

still no answer from ea I'm so fed up with this game I've emailed them direct and they don't even have the decency to respond I still cant put my car on 1000 for invitationals I'm at 550 just to be able to compete and now the ai are terrible smacking you of the track  driving on the grass to over take if I could get my money back I would but I know I have no chance