Overcharged by Land of Prestige Holdings for support line

It's now been 10 days since my initial complaint, and Land of Prestige Holdings still hasn't addressed the core issue. I've received generic responses that don't actually solve my problem with their repair service.

Dear customer, I am reaching out regarding your recent complaint about our upgrade plan. First and foremost, I want to extend my sincere apologies for the frustration this situation has caused you. As the Senior Customer Representative at Land of Prestige Holdings, 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 $438.22 to your original payment method 2. Added a $438.22 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-206BB45F 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, Hayden Moore Senior Customer Representative Land of Prestige Holdings