I second Effie L., had a very similar experience, and actually couldn't have put it better than she: "I realized that once you pay her for your services, both she and her staff really want nothing more to do with you. They are unable/unwilling to admit that just possibly some of her work might be substandard and that she needs to make good on her mistakes."
In addition, one of my wound dressings was not properly applied by the clinic and, after calling the emergency number to hopefully get it reapplied at the clinic immediately, I was told it was fine and I didn't need to come in. Lo and behold, I got an infection days later, and the clinic made me pay for the cost of treating the infection!! Unethical behavior.