Since Bandcamp functions like a marketplace, artists and labels are responsible for their own pages. You may need to contact an artist or label for a few reasons:
For help tracking your merch order.
For help sorting out problems with the original audio files uploaded to the account.
For questions about item availability or sold-out items.
For licensing or usage rights (like whether or not you can use their music in your podcast or YouTube video).
To shower them with praise and applause for their incredible music.
To contact an artist or label, click the "Contact" link in the lower-right corner of their account to send them an email.