Youre saying you got full custody with 60-40 in your favor? WHat was the final settlement?
Now, on the fact that he says you owe him, you dont' until he gives you a bill, but he won't represent if he still thinks you owe him. Is it possible that he didn't look at his records on the day you & he talked (it's not like it's that easy to grab everything and have it all up on your comptuer when you get a call from someone) and didn't know that you'd paid already? Does someone else do his billing and accounting? Most lawyers have a bookkeeper or billing service.
He made you uncomfortable so don't use him again. he's a pig and was making crude suggestions, but you need to calm down and pursue the situation with your ex. Pursuing anythign with your lawyer will get you nothing except mabye a copy of whatever he says is an outstanding bill and a certified copy of the signed decree that should really be available at court for a whole lot cheaper for you.
File a complaint against him. Simple as that. From what I can tell, though, ti's not like he owes you money and hasnt' given it back, that he made any outright overatures, or anything.
And if you're saying he's not competent and you'd like to sue him for not getting everything you want in the divorce, be more specific with us and we can tell you whether it's worth looking into or whether what you got is kind of standard. Not that your ex with the sexual suggestions is standard, but we'll have to fix THAT separately from figuring out whether there's anythign to fix with your lawyer.