When you start a free trial, you should not be billed until the end of your trial period. If you believe you've been charged can you take a look at your purchase history and double-check the charge is from Lumenate:
We've had this raised multiple times, and it turns out it's another payment from another service that had just coincidently timed with the Lumenate free trial.
If it is showing that you've been billed by Lumenate, please reach out and we'll dig into this with you! ✨