They don't have to pay you unless you sue them in court and win--which is probably not economically worthwhile, unless you suffered *extensive* burns and *large* out-of-pocket medical bills. (That is, you could spend more time and money on the lawsuit than it would be worth.) Otherwise, it is voluntary on their part whether to pay you or not. If you refuse to speak to them, they'll probably refuse to pay you on that basis; so if you are seeking compensation, it is probably in your interest to speak with them, so that hopefully, they will offer you something.