This agency is absolutely not reliable. What they ...

This agency is absolutely not reliable. What they promise in a job interview is not required.
They make a lot of mistakes on the pay slips which can lead to significant salary delays. Overtime is often not counted in the calculation at the end of the month. Finally the schedules are very poorly done or impossible to hold for flying that can do 3.4 sites in the same day in very remote places.
Added to all this, contact is often difficult between employees and managers who are not available.