I'm new to quilting and just learning and I assure you I would notice the difference if something was wrong.
NO I would not give her a second chance. If you run a business giving great customer service should be a priority. 100% satisfaction and guarantee should be the first policy regarding a customer is totally satisfied. I would let her know of my dissatisfaction and try and get it resolved and if I couldn't I would let her know her services are no longer required and I would put it out there for my friends and family to not use her,,,,, not if they want it done right.
I learned over the years when I was in retail and direct sales that word of mouth can ruin one's business faster if a customer is not satisfied and it cannot be resolved than if you have one satisfied customer.