Write one source of truth
Publish a single page that says what is affected, what customers should do and how to claim a replacement or refund.
Agree the wording before you reply
Have the person responsible for the recall approve the saved replies, so no agent improvises a safety statement.
Separate recall tickets
Tag every recall message so you can count them, route them and keep them out of normal response-time reports.
Put safety first in the reply
Lead with what the customer should do now, such as stop using the product. Explain the rest after.
Hand off the unusual cases
Injuries, damage and press questions go to the named owner immediately. Do not answer them in the queue.
Report and close out
Track claims received, resolved and waiting, and update the page and replies as the process changes.