Upper Control Arm Camber Bolts

Torch has worked for me many a time.
Those bolts probably started seizing 3 to 5 years after the car was built. By the 6 to 8th year, those parts were permanently fused. You could probably put that car in a swimming pool of penetrant for 10 years and it won't help a bit.
Ok I'm guessing and exaggerating, but you get the point.
The torch will be your friend.