features were not included as advertised, how to deal with this issue?

I got this message from Dell a few days ago and today also.

Dear Customer,

Thank you for choosing our products.

Upon reviewing your order, we acknowledge that the following features were not included as advertised on our website:

1. Dolby Vision
2. Energy Star 8.0
3. HDCP 2.3 port

We apologize for any inconvenience caused by the discrepancies in the technical specifications of your order.

We are actively investigating this issue and will take necessary corrective actions. Your business is important to us, and we appreciate your understanding.

If you wish to reach out to us, please contact our Online order support team via www.dell.com/support.

Best regards,

Sincerely,

Dell Technologies

Please do not reply to this mailbox

when I contacted them to resolve the issue, their answer was, 

The delivery date has already exceeded 10 days for the relevant order, so it seems difficult to return the product.

any idea how to deal with this issue ??