Your credit/debit card could have already expired or have insufficient funds. Please try with another credit/debit card, otherwise, contact your bank directly for resolution. All major debit and credit cards (Visa, Mastercard and American Express) are accepted on the SP Utilities app. For other transaction and payment issues, you may contact us at 6916 7799 during our operational hours for assistance in resolving this matter. Our operational hours (excluding public holidays) are Monday to Fridays, 9am to 11pm, and weekends, 9am to 1pm.