The HTC Hero requires a data plan, which includes the use of Sprint TV. Unless you somehow have subscribed to Sprint TV Premium, you shouldn't be charged for Sprint TV. Are you sure the charges are not for something else?
Sorry to correct you Claudia, "Sprint TV Premium" is what is included in the Everything plans, "Sprint TV Xtra" is an additional $9.99 p/m, Plus some of the individual channels have additional charges.
I'm always open for corrections. 🙂 Bad choice of words, it's the Premium Channels including Sprint Xtra that I was referring to: https://manage.sprintpcs.com/Manage/portal/goTo?action=selectFolder&folderId=MultimediaSprintTV&zone=Entertainment&id12=SprintTV_BuyOtherChannels_DLTVFolder