I've got all the stuff I need. The fancy dress,shoes shirt, the Bug Juice and plenty of money. I also have the quest. The slave master keeps ignoring my request of something special. I've even tried buying all the household slaves and freeing them, that doesn't help. I see the girl in one of the cages near the gate. How do I get her?

Never mind I got it solved. I had the quest from the headman, but I didn't talk to the witch woman. After talking to her I got the lady slave...

I know that must have been frustrating. Glad you got it figured out.