Blank Signed Cheque misusing by filing Cheque bounce case

Cheque is bounced & party tried to encash my blank cheque which I gave them for some other purpose by misusing it I already transferred amt online 5 days back Informed over phone but they were not happy with security deposit refund after settlement I just look for maintenance of building & I am not owner of building neither agreement was made with me After getting their amt online They wrote 7 times more amt on cheque and it is bounced now I have stopped payment of cheque Now to be in safer side What all should I do ? Should i sent them legal notice for criminal offence of misusing my cheque before they actually send me legal notice of cheque bounce? Can I go to crime branch & report that person is trying to misuse my cheque What usually happen in case of any cheque bounce ? Will police consider the thing that even though amount was transferred online but still other person has deliberately deposited cheque in wrong way & misusing it ? what can be done for this ?