There are several reasons why a promo code might not work on neoballs.com:
- Expired Code: The promo code might have expired.
- Usage Limit: Some codes are for one-time use only.
- Minimum Purchase Requirement: The code might require a minimum purchase amount.
- Specific Items: The code might be valid only for certain items.
- First-Time Purchase: Some codes are valid only for first-time purchases.
- Incorrect Entry: The code might have been entered incorrectly.
If none of these reasons apply, contact customer support for assistance.