You can cancel your subscription once logged into your BURST account on the BURST website.
You can log in through https://www.burstoralcare.com/login.
Canceling a subscription from a Laptop/Desktop:
Once logged in you will see the person icon
in the Right-hand corner, This will bring you to your account and you can then select the My Subscriptions tab from here you can select edit and then remove to cancel your subscription
Canceling a subscription from a Mobile device:
Once logged in, you will see the Menu in the Left-hand corner, select this, and then account, you will be brought to the log-in option, once logged in you must navigate back here and select the Account.
This will bring up your account and you can view the My Subscriptions tab from here you can select edit and then remove to cancel your subscription.