New poured driveway discolored

Had extended driveway , and slab poured on the side of house three weeks ago, and it still has dark grey mottled spots through out as you can see. This was poured when the temp was very high over 100. I am very concerned that even after 30 days this is not going to look right. I have not contacted the contractor yet, wanted to get some advice, but I really am concerned. Any info. will be appreciated.
q new poured driveway discolored
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