Police registered IPC section 307 against my family

There has been a dispute between my neighbor and my family over a wall which is being shared by both the roofs (my house and neighbor house). That case is going on in the court. So my neighbor uses to provoke my father every now and then so that my family can indulge any fight with them and they can take benefit out of this. On 16th October 2017 my neighbor first started abusing my father and later beat my sister and mother with sticks and humiliated them in public when in defense my brother and father started beating them, they showed police the edited video captured by their CCTV camera (installed by neighbors in front of their house) (they only showed the part in which they were being beaten up). FIR was registered from both the sides but they filed charges against my brother and father like IPC sections 307, 452, 147, 148, 149 and 323. No action has been taken against them in spite of FIR registered by us also. Then an investigation officer was appointed to look into the matter, he took his time till now and assured us that he will investigate the matter by fair means(unbiased) Neighbor has stong local political support so police is saying that your father and brother have to surrender else we will issue kurki warrant. No one is listening to us Kindly help me Thanks