Ethical Businessman, there probably aren't receipts, as they expect you would look at your account history with them for specifics on your payments. From their Terms and Conditions: "To view the specific details of your membership, including price and end date of your trial period, visit www.flixjunky.com and click the on the "Your Account" page."
Did you cancel your membership with them? If you did, then again this is from their T&C: "If you have received an e-mail confirmation confirming the cancellation of your membership yet are still being charged, please contact us so that we can closely investigate the matter. You will be fully refunded for any additional charges that you incurred after the date of cancellation in question. Under normal circumstances, a membership cancellation automatically prevents any further billing."
If not, what exactly are you "So ANGRY" about?