False accident fir

On 1st october i was driving a bike on One way road in panchkula.Traffic was flowing contunuelly and smoothly as it a good road with divider.Suddenly a girl came running from the left end of road and tried to croos the road from a broken railing on divider and no obviously no Zebra crossing was marked.I immediately applied brakes but my bike rammed into her.She got her leg fractured and i got my shoulder fractured and many other injuries on knees elbows hands which bled badly.Next day the girl reported to police against me with false allegation of rash driving.Police called me and kept on asking for money for 14 days and i refused.On 14 oct police lodged FIR and arrested me next day and produced me in court from where i got bail. Since the case is false and police lodged FIR without any investigation knowing the fact that girl was crossing the road illegally what can i do to cancel the FIR and how can i sue girl legally. Filing of chargesheet is due on 20th december 2017.Kindly advice me.