Wipro — Wipro wipro not providing an employment reference letter.

I have worked with wipro between 2010 and 2019. I am planning to apply for an australian pr and require an employment reference letter with my roles and responsibilities, but the finalsettlement team or the letters.onboarding team is not responding to any of the follow up emails I have been sending them for past 30 days. The helpline tickets are closed with no resolution.
Wipro only provides the original contract and the relieving letter which does not contain this information and will be rejected by acs because these details won't be furnished.