Bajaj Finserv — not getting cash back vochers

I brought LG Washing machine on July in Devi international jayanagar, bengaluru. But I will pay 7 EMI's already in bajaj finserv but vouchers didn't came please do needful as early as possible.they told me after paying of seven Installments the vouchers will came like that he told me. so that i am waiting for vouchers (Rs.7, 000/-) the vouchers didn't came. so that i am raising the complaint.

Thanking you,