I had a frustrating e-mail exchange with Malaysia Airlines. I explained very carefully via e-mail that I was arriving on British Airways first class and connecting to a domestic business class flight, and asked them to confirm that I was eligible to access the Golden Lounge FIRST CLASS section. I gave them my booking reference and I specifically typed FIRST CLASS in all caps. I also quoted the OneWorld lounge access rules. I wanted this in writing as I wanted to prevent an argument at the lounge entrance.
They replied with a non-answer: "Kindly be advised that you are eligible for access to the Golden Lounge for First class and Business class passengers."
No doubt someone trying to meet a KPI of providing 24 hour responses, except it's a non-response in this case!