I'm a songwriter/musician based in England.
I've just received a Royalty statement from my publisher. In it it says that one of my songs - She said she loved me, has been licenced for use in the Samsung Mobile Phones 300 commercial used by TVC in Greece.
I'm wondering if this is the song you've been searching for. I haven't seen the advert but would be interested to know if it's the same one you've seen! I can send you an mp3 of the song if it is.