After exchange of couple of emails to send documents, here is the answer of QA...very straight forward :)
Thank you for writing to Privilege Club.
Our sincere apologies for the delay in replying to you.
We have received your request for Privilege Club tier match. Kindly contact a Qatar Airways office nearest to you, along with your existing membership card, for assistance with your request. Our sales team will be able to assist you further.
Please click on the below link for the contact details of Qatar Airways offices worldwide for your reference:
Do let us know if we can assist you any further.
Privilege Club Team