Giants promo codes-Anyone else having problems?

Twice I tried ordering online using promo codes (first time was "NBC
11", the latest, "Chevron Ticket Special"). both times the code was not
accepted.

The first time I emailed the team and a reply told me I could also use
the codes on the phone. When I tried over the weekend the person on the
phone said they she was unaware of the code. When I called back another
rep said it could only be used at the box office. When I tried the
"contact" thing on sfgiants.com I got "unable to process".

I called the team on Monday and the person who answered seemed
unconcerned and only said ,"OK, I will pass it on".