Why can't I buy from cd keys nor known as loaded?

"The transaction has been declined by your bank. Please contact your bank for further details. Payment ID" appears every time I try to pay but it isn't my card thats bad since I triead with another card and got the same result. I tried looking through the support and help but as usual one never fins what her or she is looking for. Is it that cd keys has shut down, every one has this problem or what? Should I just buy from another place?