How can i get the police complaint quashed and get my bank account activated?

The complaint is about cheating worth Rs 20000. I have no idea what should i do. I am briefing the whole story. Please go through it and help me out. Its 3 years old story. A guy took Rs 35000 as consultancy charges for some job back then. But he couldn't get me job and also ran away with money. Somehow after searching for quite long i got to him and asked for refund. After so many attempts he agreed to refund me and asked for some time and account details for returning my money. I gave him my ICICI & HDFC account. But again he asked for SBI account because he didn't have other bank branches there. So i gave him my father's SBI account details. And as promised he deposited Rs 20000 to the SBI account and asked for some more time to return remaining. I agreed as he had returned more than half & i trusted him again. But i was surprised when i came to know that all those 3 account have been debit frozen by respective banks. I didn't understand anything so i contacted the banks. They told me that there is a complaint filed against these accounts for cheating for Rs 20000. The point is , that guy dumped someone from hyderabad posing as a mobile phone seller and took money from him in my father's account. So the guy who paid for mobile got nothing and he made a complaint against the transaction and my account got blocked. Somehow that guy also got my number from bank details and called me and told everything. It was obvious that i was the one who cheated him according to him. I didn't have any option. I begged him to take the complaint back and also returned his Rs20000 myself. But still that guy didn't do anything for it to be settled. I still have the deposit receipt copy of bank .Its been more than 3 years since then and those accounts are still frozen. And banks say they need instructions from police to activate the accounts. Biggest problem for me is that more than A lac rupees are stuck in those accounts collectively. That person tells me to come to hyderabad then only anything can be done. I was ready to go but my parents fear that and tell me not to go. I haven't heard anything from police also in 3 years. We are a middle-class family from Bihar. 1 lac is very big amount for us. We don't know what to do. I have already returned the amount for which the complaint was made. Please guide me what should i do to get it settled. Pls help.