Prepare the useful details
State the affected platform or service, approximate time including timezone, device and application version, the action attempted, and the exact message shown. Screenshots can help, but remove balances, credentials, personal documents, and unrelated account information before attaching them.
Urgent platform risk
If the concern involves an open position or inability to use a platform function, explain that clearly at the start of the email. Sending a message does not itself change or close a trade, and email delivery does not guarantee an immediate response, so continue to manage risk using available platform controls.