When you are logged in, you can click on "My profiles" at the top right, select the desired location and then click on "Manage package". You can cancel the package at any time at the end of the term using the "Cancel package" button.
Depending on which payment method you have selected, the term is one quarter, six months or one year from the time of booking. The term will be extended by one month, one quarter or one year if you do not cancel your package at least one day before the end of the term.