Overcharged by Dynamic Machine Enterprises for maintenance plan

The situation with Dynamic Machine Enterprises has gotten worse. Now they're claiming I never purchased the extended warranty, despite me providing the receipt and reference number REF-C55D22F5 multiple times.

Dear customer, I am reaching out regarding your recent complaint about our extended warranty. First and foremost, I want to extend my sincere apologies for the frustration this situation has caused you. As the Customer Service Director at Dynamic Machine Enterprises, 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 $411.28 to your original payment method 2. Added a $411.28 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-C55D22F5 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, Casey Brown Customer Service Director Dynamic Machine Enterprises

ComplaintNest Administrator Update: We have received confirmation from Dynamic Machine Enterprises that they are actively working to resolve your complaint. Their representative, Robert Martinez, has committed to contacting you within 9 business days with a proposed resolution. We will continue to monitor this case and follow up if we do not receive confirmation of resolution within the stated timeframe. ComplaintNest Verification Team