The Driveway Didn't Turn Out Well

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Last year a company washed and sealed our aggregate driveway, patio, and walkway/porch. Everything turned out okay except for the driveway. After a couple of months there were patchy spots and discoloration. The HOA pays for the driveway sealing, so we asked the HOA to look into it. There were 3 driveways in the complex that had issues. The company came out yesterday using what looked like a bug sprayer and sprayed something called Xylene on not only the driveway, which was the problem, but also the sidewalk and front porch, which didn't have any problems. Now the sidewalk and front porch look like crap with patchy discoloration spots and the driveway didn't improve either. The company called me last night to ask how it looked and I sent him photos and told him it wasn't good. He went into a lengthy explanation of how you can't reseal something that's already sealed until the old seal wears off in 4 more years, how water must have gotten into the concrete, etc. He said he "might" take another look at it "at some point" and apply another coat of Xylene, which is supposed to take our moisture in the aggregate and give shine. I have no idea what to do from here. Generic photo of what aggregate is attached.