I understand that you want to know how to get a refund for the SlingPlayer for Android application, since it does not work fine in your area because of the poor Internet service.
We understand your frustration and how you feel about this situation. However, Sling Media does not sell any of the Mobile applications since they are sold through their own stores. This means that the only way to get a refund is through the Android Market, according to their policies. With this in mind, I encourage you to check the following third-party link:
Hope this helps.