The organization's communication with customers covers: giving information about its products and services; dealing with enquiries, contracts and orders, including changes to them; collecting customer feedback on its products and services, complaints included; handling or controlling property that belongs to customers; and, where relevant, agreeing specific requirements for contingency actions.
This control maps to 16 controls across 8 other frameworks. If you already hold one of them, the evidence you collected for it is the starting point here rather than new work.