You can find the details of your subscription in the tab "Profile" > "My subscription".
If you wish to change your subscription, click on "Change my subscription", select the subscription that suits you and follow the different steps until you validate your subscription (you can also consult them by clicking here).
Please note that you can choose a subscription that is higher than the current one (you will be charged the difference between the current subscription and the one you are taking out).
However, if you decide to change to a lower subscription, the change will only take effect at the end of the month/year for which you paid.
Note that if you switch to a Free plan, your gallery will no longer be visible online, only your works will remain visible.