I realize that this has been requested on a number of occasions, but I believe I am speaking for us all when I say that your old Symbian subscribers are standing with their backs up against the wall regarding your mobile support.
I wasn't sure whether I should laugh or cry when a search for "Symbian" within this forum returned the answer: "Do you mean Symbol". This goes a long way to prove the degree to which the Symbian community has been forgotten. Indeed, the "newest" provided version of Spotify for Symbian (as far as I know) is 0.4.8.17, which was released back in 2009.
I will grant you that it has worked well for years, until two weeks ago (more or less) when the application ceased to go online anymore.
As a result, all of your long-faithful Symbian subscribers will have their favorite music expiring on their respective devices. You can read the related discussion over at your community help forums.
Given the fact that the Symbian version always required a Premium subscription and that you still provide said application on your website, I think it is fair to demand that it should work.
TL;DR - So our request is, in short; please don't pull the plug on Symbian, and please, update the old, long-served application.