You can't pause your subscription but you can cancel it anytime. Simply log into your account and click “Cancel my subscription”. The cancellation process is different depending upon how long you have had your product.
If you wish to cancel within the first 30 days then you are entitled to return the product and receive a full refund. You’ll receive instructions by email to return your product free of charge.
However, if you wish to keep your product or it is after the first 30 days then you can cancel recurring payments and further brush head deliveries. At this time you will be able to pay off the outstanding balance on your electric toothbrush (if relevant) to settle your account.