YES! Victory!

I got the official confirmation today that my claim was valid, and got my full deposit back.

I paid the 4th of january through PayPal, and used my Mastercard. I first tried to file a dispute through paypal, but after a lot of back-and-forth my claim was denied because it was to long ago. Then I filed a claim through the Dutch ING bank, since I got my Mastercard through them. The option I used is called 'Geld terug service', which translates to 'money back service'. I filed my claim around the 20th of december, and got a temporary refund almost immediately. Today I finally got the confirmation that I can keep the refund.

I believe an essential part of my claim was that Alpha originally stated in their terms that "Booked shipments will be delivered within Q2/Q3 of Year 2014.". The third quarter runs until the end of september, and in my case I could file my claim up to 120 days after the agreed on delivery date.

Good luck with your claims!