Likely there was a break down in communications.
As I recall TT does not actually run the presentations, or the "reward for attending" that is a different company (A Contractor) and likely either you called the wrong number (TT instead of the number on the certificate) NOTE,, I think you said you called the number on the cert but not sure)
Or they simply have yet to get their black tank contents together.
(One of the things I like about RV forums is you can say "Black Tank Contents" we all know what goes there, and you do not have to use any "Bad Words" like S***)