Stick to your gut. It's your business. I don't believe you were wrong in anything. Some people will complain regardless of what you charge just trying to get a better deal. Where I live, $85 to quilt a queensized quilt is a steal. My fee would come to $185 (Can) as I do FMQ so everything is a custom pattern. You stated your price, you needed to fix it before you could quilt it, and you did the job you said you would. She is in the wrong . The adage "the customer is always right" is ridiculous. Some people just can't be pleased. Murphy's Law says that if you gave her a discount price, she'd bring more to you and expect the same deal - and tell all her friends that you work cheap. Stick up for your self.