If you subscribed via the TBN Android app, you will need to manually cancel on Google Payments.
To manually cancel, follow the instructions in this article: https://support.google.com/googleplay/answer/7018481
If you have trouble canceling there, see: https://play.google.com/store/account
Note: We are not able to cancel this Android subscription for you. You will need to do it from your end manually.