To contact Hotmail customer support uk, 0-289-621-5422 go to the official Microsoft Support 0-289-621-5422 tollfree page and sign in to your account, then select the relevant Microsoft product or service, and use the self-help options or choose to connect with a live agent for chat or phone support. You can also initiate a service request online or, for business users, through the Microsoft 365 admin center.