Alaska Airlines Mileage Plan - HELP!! Signed up for c.c. but can't find post that talked of bonus miles

I signed up for a B of A signature visa card in Sept. I did this because of a post on Flyer talk that stated:

Sign up for this card through an alaska airline employee & get 15000 bonus points. This was posted by an Alaska airline employee. She also posted her contact info. ( I think they get credit )

Problem: I only got 5000 miles for signing up & I was stupid & didn't print out the ad or the post!!

I am new to this site & tried a search, also, did a Google search----NO Luck.

What do I do?--------------Christine

I don't think there was a 15k offer but there was a 10k one. Here the link, times running out.

http://www.flyertalk.com/forum/showthread.php?t=470170&page=1&pp=15

Thank you so much !!!! You are right it was 10000 miles (wishful thinking! )