You may have inadvertenly ordered a premium channel or PPV. If you were on a channel that was not subscribed to (especially premiums) you can subscribe from the box by answering yes to to consecutive prompt screens. Other than that, haven't a clue what you did.
I know hindsight is 20-20 but next time if you don't understand what something is asking, don't agree to it.
If a forum member gives an answer you like, give them the Kudos they deserve. If a member gives you the answer to your question, mark the answer as Accepted Solution so others can see the solution to the problem.