Samsung m30 mobile - Executive has ask to transfer money and transferred

An executive from this concern called me and told me about the complaint I have registered on not receiving the Samsung m** mobile phone. He said he is about to help me in the refund of the amount and asked me to transfer **** rupees. I transferred the money transaction id is ************. Then he asked to transfer an amount of **** as GST and I transferred the amount transaction id ************. Then he told me that his work is over and has been transferred to state authority. He asks me to transfer an amount of ***** and I transferred the amount. Transaction id ************. Then he said that the amount transferred is delayed and has to pay an amount of ****. I had no money so I could not transfer the amount and he ended the call. What should I do to get the amount refunded?
I am attaching the amount transferred proof of transactions made through google pay. Find the attachments.