Denied with message: However, the level of your frequent flyer program membership is not equivalent to Star Alliance Gold. As such, we’re unable to fulfill your request to match your membership status to Elite. Your membership status in another frequent flyer program must be equivalent to at least Miles&Smiles Elite status to be matched. Method: Feedback form is here: https://www.turkishairlines.com/en-int/any-questions/customer-relations/feedback/ They'll email back asking to provide: A photograph or scanned copy of your passport A photograph or scanned copy of your membership card (front and back) for your other airline’s frequent flyer program A statement for the same membership showing your flights for the previous two months