1) issue friend uncle legal notice to repay Rs 1,50,000 advanced to him as loan by way of RTGS
2)if your uncle admits his liability to pay you Rs 1,50,000 it will help you in filing suit for recovery of money
3) suit can be filed in Delhi
4) even if you don't have any agreement exchange of correspondence between parties is sufficient to prove that it was advanced as loan
5) burden of proof is on you that money was advanced as loan