Blank Signed Cheque misusing by filing Cheque bounce case

I am staying as a tenant in building where owner stays in different place In absence of owner I was showing the house to new tenants but agreement was made in Owner name We have to pay for water tanker charges & later on owner was refunding it Now some months back when i was leaving that city to my native place I gave blank signed cheque to one of the other tenants who will be looking to pay maintenance charges etc. thinking they might need money & they can use blank cheque for maintenance purpose of the house in unusual event its all verbal Now because of my medical issues I was not able to go back to that city from long time & collect my blank cheque from that person whom I trusted & in between they informed they are urgently vacating the house I gave them instructions on phone to handover my items including blank signed cheque & original rental agreement of other person to someone else as they were vacating the house But now they cheated me They deny to give my items & told until they will get back security deposit settlement amount back, they will not return my items back. I told them we can discuss on final settlement amount after deducting Painting,Notice period charges etc once they handover my items to my friend They just tried many ways to findout how much amount will be returned to them so that they can misuse my cheque if amount is not upto their expectation One of their friend sent me photo of blank signed cheque through whatsapp 15 days back to know how much amt they will get back & told he will write same amt on the cheque whatever i will say, once i told the amt he cut the phone & never written the same amt what I told to him to write on cheque. I have all this proof in my whatsapp Now some days back When i came to know abt stop payment of cheque facility I took their A/C no & sent final settlement amount online informed them over the call that amount has been sent & these were the deductions His father warned me that I have your blank cheque & he want full amount without any deductions otherwise he will file case against me I tried to explain him that I am not the power of attorney for building & I didnt give cheque to you 2 years before when you took the house I gave cheque to them just some months back for maintenance purpose When i explained of valid deducting charges from security deposit amount & asked his father who was on the call Why he has issue in the amt i transfered online he replied that he will discuss with his son & will come back to me for which they never came back & deliberately deposited cheque in bank without discussing with me further after writing 7 times more amt on cheque what I transfered online Cheque bounced today & I have stopped payment 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