We hope you don't mind us replying in English as it's the Community's official language.
Keep in mind that the discount is active on your Spotify account for 12 months after you've first applied it on your account. If you're within that period and you've made any recent changes on your subscriptions, we'd recommend making sure to head here once more. The discounted rate should automatically begin on your next billing date after that.
Let us know how you get on :)
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"Kindness is the language which the deaf can hear and the blind can see." - Mark Twain