Paint.NET :: Replacing Text In Picture With Different Text And Wand Tool

I have to replace text in a banner image with different text. Maybe if I upload the banner, it would be more useful...

I have to replace "Customer Satisfaction" with some other text. The text is embedded in the image; so, it's not that easy, at least for me, to replace it without making it look amateurish. Of course, I duplicated the background and worked on that layer.

First method I tried was using the clone stamp, zooming in to 1600% to painstakingly erase it. But then when I zoom out, the background where the text was placed over does not match its surroundings and looks like someone shaded it. If you zoom in real close, before making any changes to it, you'll see that the "green" (what the RGB is) touching the text is different than the "green" in areas not touching text.

Next, I thought of using the magic wand to select the text for me and that looked liked it worked. But the problem is once I select it, how to delete it or blend it in with the background. That is, if I select the "C" in "Customer Satisfaction" with the magic wand, for instance, pressing delete does nothing. Then I found I can fill the area, after I select it with the magic wand; however, what the RGB combination is of the background. Is there a way I can find out what the RGB value is of the background, then apply that to my fill color and effectively delete the "Customer Satisfaction" text?

Once I'm able to get rid of the text, I can use the text editor plugin tool I downloaded to replace the text.

That's my logic, anyway. How I can replace text in an image, preferably as neatly as possible.