I recentely recieved 2 giftcards, today 13-04-2016 I tried to redeem one of those cards and it wont let me.

I keep getting the following msg:

Helaas kun je deze Premium-code niet op je account toepassen. Dit komt waarschijnlijk omdat je een bestaand abonnement op Premium hebt dat niet met een Premium-code kan worden gecombineerd.

Translations:

Unfortunately you are not able to active this code on your account. This may be because you have a Premium account  and this card can not be combined with a Premium-code.

2 Months ago I was able to redeem a card and 2 months before than aswell and before that also. What is going on I never recieved any messages that there were any changes.

I am pretty upset by this and want to know what Spotify is going to do about this problem? Why are you selling giftcards that cannot be redeemed?

Regards,

Rogier