Cognizant — Relieving letters & payment not received

Address: Pune,Hinjewadi phase1

I had resigned from cognizant in the month of MAy 2021 and its more than 45 days i m keep asking for my relieving letters and salary but no body is responding. I am keep writing an email to the HR Mr Akash Gaikwad
(healthcare project) but complete Hr team and clearance team is not responding me, actually they are not bother about my request. I am tired up with there careless attitude.
Please help me i need my letters along with salary.