Безопасен ли worldline.com?

Faulty fraud detection - It blocks multiply ebay transactions I use Ebay and Paypal to buy a lot of stuff. One of the features that I like of ebay is the cart, where you can save the items you want to buy and pay all in once, so it´s easy to buy many small things in once. When I use that feature Wordline blocks my mastercard. Their reasoning is: ¨multiply transaction to chinese sellers seem suspicious¨. Really annoying, I am considering switching to visa.