How to claim back a cheque issued to a broker to reserve aproperty?

A broker told me that to reserve a villa unit, I have to give a 50k cheque and assured me that he will not send it to the bank to be encashed; it is just for reservation purposes.

I told him clearly I don’t have funds and not to deposit my cheque until I confirm him to present it. I liked one unit and asked him to reserve it but to make sure not to deposit the cheque until I give him confirmation for the same.

He didn’t wait for my confirmation and called me saying the cheque got deposited but I refused and told him strongly to take back the cheque from the bank.

I managed somehow to hold the cheque from banking and the sales guy offered me to stop the cheque and make a payment of 20k which will hold back my cheque.

He also said he will return back the cheque to me, and with this agreement, I paid 20k through a credit card. I got online payment receipts also.

After this transaction, the sales guy went out of the UAE and came back after 10 days. But still, I did not get my cheque back nor the new reservation form.

Every time I ask him about the cheque he says it's in process.