Paytm — unfair trade practices

Address:

679336

Paytm had given me an offer to get cash back for mobile recharges. Just to get that offer, i did 3 mobile recharges one after another adhering to all of their terms and conditions.
But every time i did the recharge, they would create some new unwanted offer & would avoid giving me the cash back.
If they're not interested to give the cash back, they can freely tell so without resorting to such cheap tricks. Why don't these guys resort to begging instead of committing such frauds & unfair trade practices...
The wallet mobile no. Is [protected].