A Police Officer neglected to make charge sheet and didn't forward the FIR to the court

On June 26 2017 my mom has filed a 498A case on my father and his family members. Police have filed the FIR but didn't make charge sheet. Even though we have requested the local CI to take charge on this several times , didn't respond. We have also met SP of Nalgonda District to enquire about this case , but there's no response from the ground level officers. It's quite suspicious for us to realise that even after 2 years of filing an FIR , neither Charge sheet was prepared nor the case was forwarded to the local court. In these 2 years we met the CI for some hundreds of time and requested him to take charge but all our efforts went in vain. I can see the police department negligence here. Now that CI was transferred to another city and meanwhile two CIs have also worked in that station and were transferred. But our case is still pending without any progress from past 2 years. My question is how can I make this case move? How can I claim damages from the police officer who neglected my case ? What should be my next move? Hope you answer these questions soon.....