Should someone be paid for doing a poor job?

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Here's why I bring up this question: Yesterday, a freelance landscaper who's mowed my lawn satisfactorily showed up yesterday to work on a neighbor's lawn. I didn't think anything of it, only an urgent errand that I had to accomplish that day. When I got home, that landscaper was still getting the leaves off my property. BUT he wasn't as thorough in the lawn's spring cleaning as I would have liked. For starters, he cut my clothesline, rendering it unusable. He promised to "fix" it but never did. Next, he ruined the shrubbery in the back, snipping at it on one side only. As a result, that lovely evergreen looks lopsided, like the Leaning Tower of Pisa, a total disaster. The biggest shock was that he blew nearly all of the leaves in back of the garage. I was so shocked to see that. Then he slunk off, like a coward. I'm sorry that I didn't check things out more thoroughly, but never asked him to mess with that evergreen or blow most of the leaves in back of the garage. Here's the kicker: he actually expects to be PAID for that disaster. I'm only thinking of paying for the leaves that he actually bagged and the seeding of grass on the front lawn, then telling him that he's fired. I should have learned my lesson last year, when he had his wife trim my front hedge. She snipped the thing by hand, giving it a hacked-away lopsided look. Luckily, I remedied the problem by retrimming the front hedge with an electric trimmer. I assumed that there would be no similar incidents, but there was yesterday. What do you think is the best way to handle this? Am I right in only paying for what's been done correctly? Should I make him take another look at the disaster he's created and remind him that he's not getting paid for it? (I'm firing him once this situation is taken care of.)