Thank you for your post!
When it comes to the Azure Free Trial $200 credit, this credit can only be used within the first 30 days. Any unused credits cannot be carried over to subsequent months and cannot be transferred to other Azure subscriptions. However, I believe what you're referring to is the popular services being free for 12 months. For more info - Azure free account.
If you have any other questions, please let me know.
Thank you for your time and patience throughout this issue.