You wouldn't be paying for nothing. Pay the bill, you're paying for the man's hours he wasn't working on something else for them. If it's worth it to you, you could try to recover all or part of the
money in small claims court. But the Biblical command, "the laborer is worthy of his hire" pertains in this case, and if you don't pay, you won't have a
legal leg to stand on. Sorry his
work didn't solve your problem, but glad you were able to do it for yourself. Good on you.
Ann