Not to harp, but what they cost is irrelevant. Those shoes shouldn't be worn with a suit, or even a sportsjacket imo. And I wouldn't call them chiselled, they're squareish ;p The stitching only emphasizes that. You need to put the fact that they're $300 retail out of your mind because we all know they're not even worth a fraction of that. I say this having wasted thousands on clothing that saw minimal use as my taste-level improved.
Having said that, we've all made mistakes, save for Manton, perhaps, as I get the feeling he was born wearing a perfectly fitted bespoke suit. I myself own two pairs of Kenneth Coles, both of which I have yet to throw-out, even though I will never wear them again. I say return them while you still can.