Infosys — Salary Not Credited from last 2 months

From Last 2 Months, I started working in Collabera as System Administrator.
Our Client is infosys.
From the last 2 months I didn't receive salary from collabera/infosys.
I called and messaged many times to Collabera's Staff, but they didn't respond to any of my calls and messages.
This problem is not only mine, all of my teammates are facing the same problem.
Please kindly resolve my problem.