Thank you guys for the suggestions. I have contacted Accor Plus CS in Singapore by email (responded by Andrew) and call Gina (sales agent that sold me the membership) again regarding this issue.
They were reluctant and refused to help by telling me nothing they can do to help. She even told me that since I was no longer member with them, I must settle this myself with Le Club and then she tried to just end the call. This is the worst CS i have ever encountered and I definitely hv lost faith in Accor Plus. Had I not purchase Accor Plus membership in the first place, I would never encounter this kind of membership transfer and lose the status.