Olx India — fraud report

I have kept an ad of iphone xs max. A malaysian guy took the offer. He asked all the details of the bank to which the money was to be transferred. I gave him all the details through whatsapp. At first the bank sent me a mail to send the shipping reciept i did sent it. Then the next day i got a mail of to transfer 10k as the account that i gave was a local bank (It seems) i did a transfer of 10k. The next day i got a mail again to transfer 20k as my phone did not have insurance i did the same. Then the bank sent me a mail that due to a technical error i have to again transfer 20k; when the error/problem is with the bank why should i transfer the amount. I want my money either to be transferred from the malaysian bank (Maybank is its name). Or else i want my money to be refunded as early as possible. The product has reached the person already. Please report this fraud.