MYUS is automatically connected to your paypal, and they can take money from you, when ever they want, and how much they want. You wont even get a refund from paypal. I bet you didnt know, that they are conected.
They told me shipping is 16.99$, and they charge 47$, without me confirming it. They are scam, with hidden fees, and you will get big headache with them.
Your payment was only $17.05 for the shipment, we can provide you with the invoice that also shows that information.