To speak to someone about a complaint for a Microsoft 365/Office subscription, account, or billing issue (home use), use Microsoft Support and request a live agent (chat or call-back):
- Go to the main Microsoft Support site and select the relevant product area (for example, Microsoft 365 & Office or account/billing).
- Use the “Get Help” experience and describe the issue (for example, “billing complaint” or “subscription complaint”).
- When self-help options are shown, scroll down and choose to contact support (such as “Chat with a support agent” or “Call me back”) if available in the region.
- For some regions and scenarios, customer service phone numbers are listed on the customer service phone numbers page; business accounts may see a direct phone option, while personal/home accounts typically use Get Help plus chat or call-back.
If the complaint relates specifically to Microsoft 365 Calling Plans in the UK for a small business (10 employees or fewer), customer service and complaint handling are available by phone (0800 026 0329) or via a service request in the Microsoft 365 admin center. If the complaint is not resolved within the timelines defined there, it can be escalated and, after certain conditions are met, referred to Ombudsman Services as described in the Calling Plans complaint handling and code-of-practice documentation.
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