Yeah same issue here with Mastercard, had problem since June/July after a host was trying to get payment to send a bag that i forgot in his place. But since then i just had problems paying for new stuff, old trips that were booked in advanced, with the same card, had no problem getting deducted money from when it was due time. Just so annoying and customer service was just saying this is the banks problem and i need 3d verification for it to work, well if that **bleep** 3d verification had appeared it would be no problem.
Also when i try paypal i just get "a customer service guy will contact you shortly" here i am 3 days later, no response, i even responded on an old support ticket mail about it from 1-2 months ago.