Re-subscription for Summer promo but expiring in a month??!?

[PRIENERIE]

As you know, Spotify's having the promo for premium for €9.99 for 3 months. I read before that it only applies to people who unsubscribed before 16th of April. And I remember I unsubscribed around the first week of April. And the promo will expire tomorrow so I decided to subscribe again. BUT... It says in my account that "Your Premium subscription will end on 28/07/2016 and you will no longer have offline, ad-free music. (I saw this when I was subscribed, so I decided to unsubscribe again. Obviously I'm subscribed for the month.This message popped out --->) Resubscribe to keep the tunes flowing." Was it my mistake to unsubscribe immediately or will I be having the premium still for 3 months without having the need to resubscribe again (since I already paid for it). I just didn't want them to take my money without me knowing...