You know if you spoke with a sales rep or AppleCare rep?I fared better with Apple, perhaps because my Deep Navy Solo Loop is just 2 months old? (purchased early Dec.)
Anyway, I phoned Apple which led to a screen share so I was able to show just how unacceptably worn the band has become in such a short time.
The Rep quickly agreed and arranged for a replacement to be shipped to me. I requested a Deep Navy Sport Band instead, and this remedy is now in the works.
Cause at first I started an online chat which led to a call and it was all dealt through AppleCare. They said they couldn't set up a replacement for the band.
Knowing the band was bought separately from the watch, they passed me onto sales which just told me this is wear and tear so tough luck.
Did you buy your watch with the band? If you did, it might have been an easier case since it would be linked with your watch's warranty.