How to prove wrong allegations in false 498a

Sir, my brother got married in 1/7/2018 And filed 498a case on 28/9/2018.she is saying many wrong statements on my brother that he is asking for additional dowry, but we have not taken any money. And sexual harrasment case on my father and we never went to their house also but she put case on me for taking to my bro over phone. Now we found many photos of her with her x boy friend very close pics. How we can come out of this. If we want to fail case on them police people are not taking, even we made petition on them. All are asking for bribe. We are from middle class family. We are not much financially sound enough to cover all this hungry hands for bribe. What we should do now. Advocate are saying for quashing of this case in HC. Is that correct advice. More how much time it will take for court proceedings??. We are innocent and my parents are old. Now we are on bail in 41cr pc. Pls give a valid suggestion and advice. How to raise voice against this false 498a case???? 1.they filed like they have given 20lac worth gold and 2 kg silver. 2.sexual harassed by father he is 60years old and visited only 3 times their house in this 3 months span. ? Pls help