Originally Posted by Adraco

Youd got a reversal on your card and they were not able to match that "payment back to your card" with any matching purchase going out to begin with.

Since you are not allowed to withdraw money back to your card, from a third party, like for example Paypal, they will thus block your card since you failed to follow the rules.

I do not know, but that seems to be the likely reason here. Also, don't expect any support of the weekend, this has been proven here again and again!