URGENT! My card has expired and NOT active!

My card has expired during inactivity. How do I order a new one?
I have info that need to receive some payment.
Can I pay to my account and how much?
The second question is how to do that if I can?
Please answer as detailed as possible, because I'm not sure how his things works here.
And last question, why live chat has never been available?

Thank you so much in advance :)