The mobile number verification is done with SMS and after entering the 7 digit pin, you are allowed to enter a password:
As payment information only credit cards are accepted:
Eve though my credit card was accepted:
"Your credit card has been successfully validated. Please proceed to complete the Sign up."
I got the following error:
The link "Oracle Customer Service" did not work, so i used the Chat Support. But inside the chat was no agent available and only "Send E-Mail" worked. Let's see what kind of response i will be given...
EDIT: Some further attempts...
EDIT 2: see here how the problem was solved.