Concrete driveway needs repair

Can anyone suggest/recommend a professional concrete repair service that they have dealt with? I have talked to two companies so far. The first one told me that it would cost $2,000 to repair and the second one told me $7,000. That's a big difference and I'm not sure who to believe.

I realize that this isn't exactly a "garden" type question, but my driveway runs through my beautiful garden area and it's a real eyesore because it has sunk into the ground and has become broken in a couple of areas. It's also a steep driveway that you can't exactly hide. I appreciate anyones help on this one.