Sling TV No refund policy Nationwide

We had a previous trial subscription back in November. Due to Thanksgiving I missed the cancelation window to cancel and was charged for the next month. I contacted them and they canceled the membership but advised they could not refund. Since it was my mistake I let it go. Last night we had people over for the Superbowl and we let a friend's young daughter watch TV upstairs. She got into the account accidentally, not sure how it happened, but reactivated the account and charged one month to someone else's credit card listed on my linked Amazon account. I contacted Sling today via email and phone and explained the situation and was told they have no policy in place to protect their customers from fraudulent charges and would not refund the account. Nothing about this was authorized and they are completely ok running a company that keeps essentially, stolen money.