Just never give authorization for recurring billing. I use my credit card for one-time payments for monthly services all of the time, and I never authorize recurring billing. When you do that, you establish an on-going relationship with the merchant that isn't so easy to cancel. But you can cancel their authorization to do recurring billing in writing, and then any charge made on that ground should be refunded to you as a simple matter of course.

It generally works out pretty well if you just never authorize automatic recurring billing.