I was contracted by two individuals who represented a group of inheritors to file an inheritance case on their behalf which involved selling a building for them here in Egypt. Due to unforeseen circumstances and a severe dispute between the inheritors on one hand, and the inheritors and the buyer on the other, we were not able to reach an agreement regarding my compensation, and after I succeeded in acquiring for them a large sum I was not paid. What are my rights upon the agents and the inheritors, bearing in mind that we did not agree on my payment in the beginning?