You do not need to pay for something that you did not order. The item can be kept as a “gift,” or you can return it if the seller covers shipping costs. You may want to check to make sure that you did not sign up for a free trial and are now being billed because the free trial expired. If this happened, you can cancel the service and take your name off the seller’s mailing list. Otherwise, you can demand proof of the purchase from the seller. If the dispute continues, you can tell the seller that you are planning to take action against them based on their unfair or deceptive business practices. This may resolve the problem, but you can notify your state consumer protection agency if it does not.