Payment delayed in every month

I am working with one of the central govt organisation on a contract basis, that is on a third party payroll. Our salary cycle is from 16th of previous month to 15th of this month. and salary of this period will be credited on 7th of the next month. e.g. Salary for the period of 16th Jan 2018 to 15th Feb 2018 will be credited in our account on 7th March 2018. But still today, on 23rd March we didn't get salary which has to be credited in our account on 7th March. This issue is there for every month. When contact yo the Third party everytime they used to tell us that The Government organization didn't paid us the bill so we are not able to give you salary. At the same time when we contact govt organization they yold us to contact 3rd pary. And our 3rd party won't receive our call at all till salary has been credited.. This used yo happen in every month.. And there's some pending EPF which was deducted but not credited yet from last 6-7 months. When we enquire abouth this at 3rd party they used to tell us when govt organization will pay bill yi them then only they will deposit this pending EPF amount.. Please help.. what we should do? thanks in advance.