Hello NehaSonu,
Further to the query of Brijendra Singh, please also confirm the reason(s) thereof.
Based on the little inputs you provided, this 'seems' to be more of an issue of unplanned/hurried hiring—without applying much mind—than anything to do with the candidates themselves per se. In which case, do you think it's professional? Do you want them to take the flak for YOUR Company's mistake(s)? For all you know, someone from among the candidates MAY have forgone other offers.
If you wish to have clear and workable suggestions from the members, please provide the full details of the situation. Else, you are bound to get half-baked suggestions/solutions based on HOW EACH member understands your inputs.
Regards,
TS