You can cancel the automatic renewal and the next subscription payment by doing as follows:
1) Go to the Account and Settings section in your Mailtrack dashboard.
2) Click Subscription.
3) Click on the Cancel subscription button* to cancel the renewal of your subscription.
4) Confirm the renewal cancellation in the pop-up that appears.
Please note that you can enjoy your subscription until the end of the period you have paid for.
If, later on, you decide you'd like to re-activate the subscription renewal click Re-activate subscription.