Hi David
Thank you for taking the time to provide your feedback.
I am sorry to see that your experience with us has not lived up to your expectations and want to understand more so that I can help.
I am pleased to hear the treatment is working well for you.
I would be grateful if you could let me know how we could have improved, so that I can try to ensure we live up to your expectations for any future orders and look forward to hearing from you.