I’ll just have to make a quick phone call to my lawyer

Me: “So… what you are basically telling me is that you like the completed logo, like the completed slogan, like the completed branding work and that you intend to use it all for your new business. Correct?”

Client: “Yes. Absolutely.”

Me: “And yesterday you called another designer and showed them my work and they told you that they can do the same work for 20% of what I am charging, correct?”

Client: “Yup. They said that your prices are outrageous.”

Me: “And you are now telling me that you will not be paying me our agreed upon price but will either pay me what the other designer would take to copy my work… or you will pay me nothing but use the work anyhow?”

Client: “Yup. Take it or leave it.”

Me: “And you do understand that I have submitted all of my work to the US Federal Copyright Office, right?”

Client: “Yep!”