how to claim PF of a closed organisation - worked 8 years back with that organisation

Dear sir,
1st question: I like to know that can we claim our PF of an organisation closed now, it worked 8 years back with that organisation.
2nd question: Also similar but that organisation is operational how to get my PF withdrawal , their HR manager is not supportive in searching my employees details and employee code saying it too of its 14 yrs old. i left the company in 2005.
some one please guide, i can pay for service of any service provider help me with this. approx amount in each of this account may be 15000 & 20000 respectively.

if you have any slip of accounts then visit the PRO of EPFO, he will help surely

Visit nearest EPFO office.
PF funds are managed by EPFo and they can help you
Closure of company does not matter
Why there was delay in getting it transferred when you changed jobs is not clear
Apply for UAN n linknwith Aadhar for future.
It will be useful for linking etc