Sorry to hear that, unfortunately this seems to be the way of things lately and I kind of despair that it will get worse before it gets better. Some people just can't grasp common courtesy and only think of "me me me me, now now I want..." :( If you can confirm that it was your texture being used you could try contacting the broadcasting company and having a moan at them about what's happened and stating that you are not happy that such a thing was done and are considering taking legal action. They'll probably try to weedle out of it but might give you the information you need to chase this, or offer you some sort of compensation.