Asking Permition for use of the song

As the song I am using for my music video is a remix of the original song 'You and Me' by Disclosure, I am emailing the company that published the original song, as they are the rightful owner of that song.
In order to find the publishers of the original song 'You and Me' by Disclosure, I went onto the website ASCAP to find all the information. The print screen belown shows the information that the website gave to me; it included the four writers of the song, the two publishers and the performers 'Disclosure'.

As I was unable to find 'Salli Isaak Music Publishing' email address, as they do not own a website and no other details other than their location, I have only emailed 'Universal Music Publishing'. In the print screen below it shows what I emailed Universal Msic Pblishing to ask for permition for use of their song.