Here is a link to the song nobody but you by Luther Allison.
At 2:00 to 2:08, what is he saying? I can hear that he says:
sweet little angel say that you done me wrong
Is it done? Or got?
I'm not hearing "got" at all though. In addition, "you done me wrong" is such a common blues and rock'n'roll phrase when singing about a woman that I'd be inclined to conclude that the phrase he's singing is exactly what you wrote:
Sweet little angel say that you done me wrong