Hello Maga (the band) fans, I'm managing the label representing Maga (the artist). I'm also responsible for putting his releases on Last.fm.
Now would you please be so kind to take up your complaints to the people who built Last.fm, instead of dumping them here? I can't help it that the Last.fm system doesn't have means to differentiate between artists with the same artist name. And I know you're not asking Maga (the artist) to change his artist name (which he has been using longer than Maga, the band) over a Last.fm issue. Because if you were... well that'd be really stupid ;)
How do you think Maga (the artist) feels about displaying the wrong photo on his artist profile? Ever thought about that? But is he complaining? No. He is not. Get a life.