You can try calling technical support in your region if they would be able to support you on the repair. Usually single key are not done by service center rather have the entire keyboard replaced.
Did someone help you today? Press the star on the left to thank them with a Kudo! If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"! This will help the rest of the Community with similar issues identify the verified solution and benefit from it.