Netflix voucher bought at Guthaben.de, but the code is supposedly not correct at Netflix?

Question is above

I always got prepaid credit there and everything went smoothly. Until I bought the 50 euro gift card

Are you saving anything at all? The cards are also available from Aldi.

I don't know if that answers my question. I buy it 2 euro more expensive but I don't have to go anywhere.

You seem to have been ripped off.

I do not know how serious Guthaben.de is and therefore it may well be that you were screwed.

If in doubt, check the code again to see if you have made too many spaces. If not, try the code with "-" and without it