To unsubscribe from promotional emails from C28.com, you can typically find an unsubscribe link at the bottom of any promotional email you have received. Clicking this link will lead you to a page or prompt that allows you to confirm your decision to opt out of future communications.
If the email does not contain an unsubscribe option, or if you encounter any difficulties, C28.com may have instructions or a process outlined on their website that provides further guidance. It is advisable to check the relevant sections of the website for detailed assistance. To stay updated on this process, you could also monitor the current web page for any changes regarding email subscriptions and marketing preferences.