RehabWorks Therapy refused to address had allergic reaction not warned about

I've received an email from Patricia Thompson at RehabWorks Therapy offering a partial refund, but I believe I'm entitled to a full refund given the circumstances. The fitness tracker was clearly defective from the start.

Dear customer, I am reaching out regarding your recent complaint about our expedited shipping. First and foremost, I want to extend my sincere apologies for the frustration this situation has caused you. As the Customer Satisfaction Coordinator at RehabWorks Therapy, I have personally reviewed your case and have spoken with the team members involved. There appears to have been a miscommunication regarding our service guarantees, and I take full responsibility for this oversight. I have taken the following immediate actions: 1. Processed a refund of $439.96 to your original payment method 2. Added a $439.96 service credit to your account for future use 3. Implemented additional training for our staff based on your feedback Your case has been assigned reference number REF-6E88EC14 for any future correspondence. Please allow 3-5 business days for the refund to appear in your account. Thank you for giving us the opportunity to address this matter. Your feedback helps us improve. Sincerely, Jessica Anderson Customer Satisfaction Coordinator RehabWorks Therapy