Paytm — I did not get paytm cash back

Address:

Hyderabad, Andhra Pradesh, 500085

Iam unhappy with quikr and paytm, they are responding about my issue, my name is harsha, my ad id is[protected], i sold my mobile in quikr they said you get 300 rs pay tm cash back, but i did not get paytm cash back please solve my problem, no one is solving my problem,