African Reptile And Venom don't do work for them they don't pay

SO African Reptile and Venom called us not us them they called us today and asked if we can help trace someone one that rand away with a lot of money that they paid him , one investigator left everything he was busy with and spend 4 hours @ R 450 per hour not to mention the costs of telephone calls and pulling reports etc. this all costs money , but when it comes to pay they say we are now un professional did they expect a company to work for free , how does some people think we even send them the report