Airtel — the airtel payment bank are not solved problem

Address:

Vizianagaram, Andhra Pradesh, 535101

I had created my airtel payment bank upi id in my airtel app on 6dec2017 and transfer the amount 300 rupees through upi in my airtel payment bank and that time the 75rupees cashback offer are running but i'm not received cashback. I'm also call the consumer care to slove the problem but they are cut the calls and they couldn't solve this problem. So, what is this? The consumer care's are not solve the problem correctly. So, solve this issue...