Re: I think I’ve just been scammed out on $1550 by Bitrefill
I have been using their service for over 2 years now and never faced such a problem or seen a complaint of this nature. But i believe if things don't work out on Amazon's side, they will refund you. Just keep us updated on the outcomes 
I received this response just now:
Censored for privacy reasons (Bitrefill) Apr 14, 21:11 CEST
Hello!
I understand your situation and the frustration, the problem is that Amazon will keep the funds when they block a card like this due to their algorithms being triggered. Which means we have no way of affecting their decision of a refund. If they do not refund us, we cannot refund you.
/Censored for privacy reasons
Seems a lot like I’ve just been scammed...