What if I have an issue with a delivery? Natalie W. April 02, 2020 16:00 Updated For any escalations, the merchant can reach out to Postmates Support using this link. Related articles What is Postmates delivery on Square? How will I know when a delivery has been completed? How does pricing work? How do I create a delivery on Square? I'm the end customer/recipient. Can you help me with my order?