[Ovendoor]

Ultimately, Sprint SHOULD not be responsible for these charges....

There are hundreds of unethical companies out there that take advantage of people in this fashion. I work at a corporate store for Sprint and although these charges are showing up on your bill, another company is providing you with a service. People intentionally or even unintentionally sometimes sign up for these ringers, horoscopes, jokes, etc. and wanna get pissed at Sprint about it. A call and credit from CS or from the store is only a band-aid, you will continue to incur these charges unless you them cancelled. Contact this 3rd party company directly or reply with "stop" or "cancel" when you receive one of their notifications.