Case of continuous cheque bounce.

My self is working is residing in Vienna (Austria) My relative gave me a cheque but it bounced because of insufficient funds. This is not the first incidence, he always makes promises and provides a fresh cheque. But this i want to file a case against him. In this regard I have already sended him a notice. Unfortunately 30 days period is about to finish and i am not getting holidays from my work. Could you please suggest if i have some option left to get my money back ? if 30 days time limit is over to file the case. can i resubmit the cheque to my bank, and send him a notice again to raise new cause to file case. Same time, may i also request to provide me a format of power of attorney as i wish to get a power of attorney on my mothers name from the Vienna court and get it counter signed by Indian consulate. Please confirm if its legally valid and accepted. I am afraid if i can get my money back or not.