Even I have written to the same 2 email id's and its been more than 2 weeks I havent received any firm reply.
Also I have been in touch with one of the HR's. Will post it here if i have any luck on it.
Hi,
I am ex-employee of Wipro and unable to get the right contact to get the reference letter.
Please share the settlement teams email id or any other contact through which I can request for the reference letter.