I like how the general theme in this thread is "fuck you." So, OP, I will sympathize with you. Sometimes it really sucks when people are allowed to walk away with crap like this. Even though you can prove and provide all the evidence, GMs let this stuff go. There's no reason something can't be done about this. For every person here that posted saying "you let it happen", I hope something bad happens to them and when it comes time for us to hear their complaints and stories of being done wrong, we can say "life's rough, deal with it."