Can't subscribe to spotify student by UNiDAYS

[musicsnatch]

Today i've tried to register for a spotify student subscription by UNiDAYS.UNiDAYS, Student, Premium, 

Therefore i cancelled by current spotify premium. Then i tried to register for the student subscription but i always get a message telling me that i can't register for the student subscription.

These are the steps i have followed:

1. Unsubscribe current subscription

2. Register at UNiDAYS and verify as a student. (Verified until 19.November.2015)

3.Go to UNiDAYS and choose the 50% Student discount.

4.Click on "Receive Discount"

5. Login into spotify (if not logged in)

Then the message appeared...

Account information:

Name: musicsnatch

Country: Germany

Discount by: UNiDAYS.

Is this a bug ? Is there any other way to subscrube for the student subscription ?