lenovo ibm will do anything to avoid refunding for a defective computer Nationwide

This is the worse experience I have ever had!
Computer arrived(from the outlet store) with a defect (delete key didn't work).
I called lenovo, and they said they can't replace it.
My options were to fix it (which looked like a long and undesired process, for a new computer, even if it is refurbished).
Other option was to return it.
And so I did. They sent me a shipping label.
No refund.
Kept transferred to different departments, when I finally reached a relatively reasonable manager, he apologized, and said he'll work on a full refund.
When the refund finally came, it was only partial, to my disappointment.
And I start emailing and calling them again, and when I finally got to this manager again, he said that the computer arrived back to them defected (non working key!).
And I said, yes, this is why I returned it.
And they still refuse to refund, thus I had no choice, but to report this to my credit card company.

I have never seen such an absurd.
They are charging me for a defect, which is the reason why I returned the computer in the first place!

Absolutely worse experience ever.