Permission for song

We have requested permission to use the song by emailing the bands record label for use in the song. The email reads:

"Hello,

We are doing an A2 Media Project for a music video, and we have decided to use the song 'I Don't Mind' by Defeater. We are inquiring as to whether we have permission to use the song. No profit will be made from the video, it is for academic purposes only. If we receive no reply, due to the educational usage of the music, we will assume you give your permission.

Thanks.

Dom Waldron (Ken Stimpson Community School)"