Client: About that illustration - cancel it.
Me: Cancel it?
Client: Yes, I want it canceled.
Me: I can’t cancel it, it’s already done. You can ask for changes, though. What didn’t you like about it? What do you wish to change?
Client: I’m simply not going to use it, so I’m not going to pay.
Me: You may choose not to use it, but you signed a contract so you must pay.
Client: Cancel the contract then.