No volume at all

So my 2ds volume has just stopped working and sometimes there is just a loud ringing noise even with headphone or earbuds anyone have a solution?

Update: now when I apply a lot of of pressure to the right side the volume works but if I don't apply enough it's just high pitched fuzz and ringing that's SUPER loud anyone have any solution? Should I take it apart or buy a new one or anything else? Someone please help