Some card transactions failing that really shouldn't!

Hi @Bryan-Square , is there a certain format for input billingContact? whether it is in the form of free text or must input the code as well as the region. I see in the region contains the code. and for addressLines there are two strings, does that mean there are two addresses or what? I’m worried that the error that occurs is due to an input format error which results in no pop up for verification.

and I see in the documentation it seems out of sync between the images below. can you give me a specific explanation or example if I want to make a billingContact input form. because I don’t see an example for this on github