Good that you got it sorted so easily, and found a polite and helpful support person! Send an email to their boss, thanking them for it!

Basically I filled out a form and sent the product back, so customer support was not needed basically. I had proof that the product does not match the type of laptop was sold for. They phoned me because the technical details they had from Dell said otherwise and most likely mine was the first case proving that wrong. I was able to show them where the problem is, also sent them a photo of the original battery, that had the type code on it and they took measures to correct the mistake on the website.

I gave them a nice rating because they deserved it.