Olx India — Car Purchase in Dec 2020 - Cashback Voucher not received yet.

Address:

D,1001, Acharya Ashram Co Hsg Soc Ltd, Off LT Road,, Vazira Naka, PM Kulkarni Marg, Borivali West,

Hi, this is Amit Mhapsekar, I had brought car Ertiga Car from Olx in Dec 2020. My Car No is MH03BE9677.
I was promised at that time that once the RC Book is transferred to my name I will recieve Cashback of Rs.5000/-.
I still have not received 5000 cash back after the transfer of rc on my name. What should be done now?
Brought the Car from Kanjurmarg, Mumbai Branch.
People involved from OLX were
Mr Pravin Shedekar - contact number - [protected]
Mr Shailesh - contact number - [protected] and
Mr Harish - contact number - [protected]

My Car No is MH03BE9677

pls help me rectify this issue