Refund refused by Engineering Bros

I've received an email from Rowan Lewis at Engineering Bros offering a partial refund, but I believe I'm entitled to a full refund given the circumstances. The laptop was clearly defective from the start.

Dear customer, I am reaching out regarding your recent complaint about our delivery service. First and foremost, I want to extend my sincere apologies for the frustration this situation has caused you. As the Client Relations Manager at Engineering Bros, 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 $228.28 to your original payment method 2. Added a $228.28 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-FA28C6CD 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, Thomas Rodriguez Client Relations Manager Engineering Bros