Looks paytm is an indian online wallet to store indian money. There is a discussion board for indian members on this forum, if you create a similar thread there, someone might offer you the deal in your locality
why you need to check the untrusted member in the forum,apart from that you need escrow in all your trades when you move with the forum. For instance, you can use the local bitcoins to find the trader who can exchange bitcoin for the paytm cash. You can also get the rate higher than you see in the price chart.