Ohhh Yess, this just gets better.

Prometric say the exam wasn't available as my card was declined. Interesting as my card company has confirmed they took the payment....TWICE.

Then just to top that off, the testing center has never heard of OTN20 promotion code!!!!

Exam scheduled for tomorrow (yet another payment taken). I'm gonna be so pissed if I fail it after all this hassle.