Here are the contact numbers from AWS. Call them ASAP, I have never had any problems myself but I recall other posters discussing paperwork problems resulting in delays.
~thirdeye~
From AWS:
If you have questions, give us a call at (800) 443-9353 see below for the extensions.
For questions regarding CWI/CWE certification contact the Certification Business Unit, ext. 273.
For questions regarding seminars contact the Education Business unit, ext. 229.