Hello Dr Bijoy,
Like Nathrao mentioned, did anyone from management make a preliminary/basic attempt to find the reasons for their refusal to sign?
Another aspect that CAN be important--vis-a-vis the options open to you--is how many employees.....out of the total strength......are refusing?
Unless you explain/give the FULL picture of the situation, you can be sure of getting EITHER misguiding/misleading OR absolutely non-actionable suggestions from anyone, including well-meaning CiteHR members--'non-actionable' meaning suggestions, that when implemented, COULD lead to other complications, possibly far severe. And then there's no point blaming ones who gave well-meant suggestions.
Rgds,
TS