Huh like that also can, did you charge him extra for the effort and OT put in !!
actually there is many cheater around, i remembered a man during my part time job, he made a 'FEW' calls home in India, realised that his bill was very high, call us to complain that he did not make the calls, make us go check all our system for error, till manager must handle the case, but we still made he pay for the bill. They try to cheat, we also learn that some people culture is to bluff or cheat their way through