I'm surprised at you, Dave!  How dare you to turn this company's work around so fast?

Here's how I see it: this company should be kissing your feet for returning their work in such a timely manner.  After all, aren't we abstractors always being asked to "rush" their searches?

If it were me, I'd offer to knock a few bucks off for the misunderstanding, but since they did order the work from you, it was their error, not yours.  You went to substantial expense in time and money in order to meet your customer's needs.  You should be compensated for that.  If the client doesn't agree, maybe you should reconsider your business relationship with them.

Regards,
Scott Perry