HDFC bill payment Auto-pay: 5% upto INR 150 Cashback

Have you even received cashback on hdfc auto payment for Credit Card bill payment in HDFC portal? 

Please suggest how do you receive it. 

1. HDFC or other credit card 

2. Payment through debit card or bank account 

I have tried other bank cc and debit card combination, haven't received 5%, only received 1% which is basically debit card cashaback upto INR 750