Hi Shital,
First of all, no person, other than PF authority, is authorized to reject your PF withdrawal.
As far as i know, if the HR person in your previous organization is not ready to release your PF amount, you have an option to fill up your form 10C and form 19 and get it signed from any Gazetted Officer and submit in the PF office. This may help out.
Seniors, please correct me if I am wrong.
Regards,
Harsh