I got this for a answer "I checked the details and see that the system is not back at Dell yet."

So It is now Aug 5. FedEx shows it was delivered "Delivered Wednesday, July 14, 2021 at 11:00 am". What is the problem?

It is Aug 9 and I am told this  "A request has been submitted to confirm if the order was returned back to Dell and once that is done, the refund will be done within 2-3 business days or soon. As the refund is in process, I will go ahead and close this case but stay assured if you would need any assistance contact us and a new case will be opened to help you" 

How can they close the case?? I didn't get my refund yet nor was told when it will be given. Fedex shows returned July 14 and they know it was returned.

I got this email, "Did it solve your problem? "Click here to reply" and mark one as an Accepted Solution."

No it didn't so why would I mark as accepted?