Yes, of course. You can pause or cancel a subscription any time you want in the customer portal. The only time when the subscription can't be cancelled is if you started a subscription which requires a certain number of payments before you can cancel it.
The customer portal can be accessed through the MAGIC LINK you received in the email that was sent to you when you placed an initial subscription order in the shop.
You can also access your subscriptions if you create an account in your shop which will automatically sync the MAGIC LINK into your account.