The Soyuz (Actually, Progress. Soyuz is for people) has much smaller capacity. A payload of 2,400 kg and AFAIK, doesn't go past LEO.
Falcon 9 has a payload of 22,800 kg to LEO, and 8,300 kg to geostationary orbit. Three times more expensive you say? Sure, it can also carry 9 times more stuff and father away.