It is not possible to cancel or alter an affiliate ID once its created. You can change the URL associated with an affiliate ID.
You can do so in the following way:
- Log into your account, click on "Your Account",
- then click on "Website Management";
- on the next page, you will see the full list of website/s with the AID assigned,
- click on edit and you will be able to change the URL assigned to a specific AID