D&S Concrete Won't Finish the Job

We've been in our new house 4 months now, and examination of the stamped concrete front porch, walk, and driveway borders reveals fading, mottling, and small cracks. I attribute this to the subcontractor, D&S Concrete, failing to seal the stamped concrete. It should have been power washed and sealed as soon as weather permitted in order to retain color and prevent cracking. Despite sunny, warm weather, and many, many calls to Steve Solano of D&S Concrete, this simple procedure has yet to be accomplished. At this stage, some methods of restoring the concrete color and then sealing it may be required.

Original drawing for front porch and walk design

Framing porch

Porch poured

Framing walk

Framing walk

Walk being poured

Walk poured

Front walk in June not yet power washed or sealed

Dull look of stained concrete walk

Mottled driveway border due to not being sealed

A properly washed and sealed walk should look like this