Proptiger — False commitment of cashback scheme

I have taken a home loan through proptiger from ICICI bank.
At the time of disbursement, I got to know about the 1% cashback scheme from proptiger representative Shaival Patel.
As per him, after 3 years of EMI, I will be getting 1% cashback from bank as per the scheme. Now 3 years have already passed and haven't got any cashback till now.
I approached bank for the same and they denied for such kind of scheme.

When I approached proptiger for the same then they said they are not aware of such scheme and Shaival has left the company.

Now what about the promise that proptiger gave me before taking the loan ?
Ticket # generated for the same is #243329