Signature Associates refused to address was promised features that don't exist

The situation with Signature Associates has gotten worse. Now they're claiming I never purchased the training session, despite me providing the receipt and reference number REF-F6C2A0C4 multiple times.

Dear customer, On behalf of Signature Associates, I would like to personally apologize for the inconvenience you've experienced with our expedited shipping. We strive to provide exceptional service to all our customers, and we regret that we fell short of this standard in your case. After carefully reviewing your complaint, I have authorized an immediate store credit to address this situation. Additionally, we have documented this case (Reference: REF-F6C2A0C4) to help improve our training and service protocols. Please feel free to contact me directly at extension 4567 if you have any further questions or concerns. Yours sincerely, Karen Jones Customer Satisfaction Coordinator Signature Associates