What if I have a problem with a payment or face any errors while placing my order? July 06, 2022 07:49 Updated For any inquiries, technical issues, suggestions and feedback, you can contact us https://www.mcdonalds.com.sg/contact-us. Related articles Mobile Order Refund Request Guide What are the payment options available? I’ve left the restaurant and realised I was charged incorrectly. I’m not willing to go back to the store. How can I get a refund? Can I save my card for future use? How do I know when my order is ready?