There are three possibilities:

1. If you started the trial period from our website and you didn’t cancel your Auto-Renewal, before your Standard/Business Trial expires you will be automatically charged. If you want to cancel the Auto-Renewal, please follow the steps from the Cancel Subscription Online Help Article.
2. If you started the trial from App Store, please cancel your subscription to stop the automatic renewal: https://support.apple.com/en-us/HT202039
3. To cancel your subscription from Microsoft Store please follow the instruction from Microsoft Store. We have no access to your account and cannot reach them on your behalf.