wow, this guy has a serious case for compensation, to claim, once he gets back to cell-reception and can call law enforcement and a lawyer.
Kidnapping and confinement, forced to do unpaid work without a legally binding contract (and someone connected to their business trying to sign one that clearly isn't legally binding, in his name, against his will), hazard pay, 24/7 overtime pay, gross negligence and endangerment, slavery, and so on.