Amazon Prime — unauthorized billing

I was billed for amazon prime membership without authorization. I would like to be reimbursed and my name taken off any membership list that they have. I do not wish to be a member of amazonprime, nor do i wish to use any of their services at this time. At one time in 2016, i was offered amazon prime membership for a limited time for free. I used their internet services for a particular series, "all or nothing" during the summer of 2016. I never wished to continue their services or make further use of the website. Please attend to this matter. Thank you kathleen d. Eccles [protected]@msn.com