I have flown VS on a codeshare CO flight twice since Nov...had the same problem...if you purchased the ticket through CO and they can pull the ticket number they should be able to credit you...but then again this depends on the rep you speak with...most default to the "send your boarding pass to us"...which is annoying...so try contacting CO and maybe you will get a helpful rep who wont make you have to wait longer and send the info in...good luck...it is a work out for these VS flights!!!