https://play.google.com/store/apps/details?id=n...
Step 1   Open paytm and under upi offer activate faasos offer

Step 2.   Now go to chrome and search faasos and select food Worth 200 or above

At payment select phone pay and in place of bhim upi enter paytm upi  and a request comes to ur paytm account don’t pay instantly

U can see timer on payment page if 300 sec after 300 seconds it will be cancelled automatically

Now go to paytm upi section and do the payment u will get cashback and refund instantly

Note cashback will be credited after four days try at ur own risk