I have made it past the SMS text message part. Now it keeps asking over and over again for my pain and I answer it and do the captcha and then it Loops back to the same page and doing it for almost an hour now. In USA here.
I'm going thru the same thing.
I don't know why they put the pin stuff.
I won't log in again at this site after taking my coin out and I'm sure most of people won't either.
I had the same issue and then changed my PIN. It could be a pattern detection code that does not let you choose what could be a common PIN or insecure PIN. There is no error message on that page, so its a wild guess.
With a changed PIN I proceeded to Step 4.