Is the rest of the yard growing OK? From the picture, it appears that it is, which would indicate that something is different in that particular are of the lawn.
Since the pine trees are up-hill, I am assuming that when it rains, the area is getting a fair bit of water runoff from the pines. You might be having a localized acidity problem with the soil there, as pines are notoriously acidic. That would make it hard for grass to grow around them without some specific soil prep.
Did the company you hired perform any soil tests before they started planting? If they did, was the test performed using a mixture of several samples taken from different places in the yard (this is pretty common), or was each sample tested independently? If the soil in the problem area was not tested independently, you might want to do a re-test from samples taken from just that area, specifically to check the pH levels.
If the soil there does prove to be acidic, there are various amendments (in this case, probably Lime) that you can apply to help correct it before trying again with some new seed. It will help if you water the area and lightly rake it first, before spreading anything, and then lightly rake it again immediately afterwards.
Also, if the soil in that location is very sandy, you might need to till in some topsoil. That spot does look nice and sunny though, and you should be able to get most turf grasses to grow there once the soil condition is improved. Good luck!