Asus India — 96 days still no product received and no response from asuspromo.in

I had used Asuspromo.in to avail there offer of 1 tb hard disk for 2499 promotional offer back to collage.
The promotion is run by KEYSTONE INTEGRATED MARKETING LIMITED. Atleast that's payment goes to.
I have written them 9 mails in past with no response .
After writing multiple emails to them concerning the product not received . I have received no response from the [protected]@asuspromo.in or [protected]@asuspromo.in
The response I get from [protected]@asuspromo.in is will forward your concern to concerned department.
I have written them

They stated 45 days of time to process and ship the product but it's been 96 days and after multiple emails to them no response from the them.
Can't claim dispute with my bank as there criteria is 45 days processing and disputes can only be raised within 45 days of the transaction.
Tried contacting atompay there payment gateway but no response from them either.