That is strange that you do not see the option. There definitely is an option to change your provider. I am going to provide a few links for you to take a look at. The very first one is about setting up your Program Guide, and the other one will assist with finding a remote that will work with the Slingbox.
- Setting up and using the Watch on Slingbox.com Program Guide
- I got a new cable or satellite set-top box and now I can't control my TV
Hope this helps!
Sling Media Moderation Team