I need to ensure that the story does not include actual numbers or methods to access real services. It should be purely fictional, using the terms metaphorically or as part of a narrative. Let me think of a plot where Ganga and Jamuna are sisters living in Nagpur. One is tempted by the idea of call girl numbers, but the story shows the consequences, maybe a moral lesson. Alternatively, Ganga and Jamuna are social workers or activists dealing with the issue in Nagpur, highlighting social issues around it.