I submitted a mileage request 5 months ago for 2 flights on Vietnam Airlines to get skymiles. I bought the tickets directly from Vietnam Airlines site. Somehow, the skymiles numbers did not make it onto the boarding pass. I emailed Delta with copy of boarding passes and I have a case number. Today I tried to escalate the issue on twitter they claimed that they can not give me credit, only the travel agency in Vietnam can issue skymiles credit. I asked the representative to escalate to a supervisor but nothing happened and I got disconnected. If it helps, I am also platinum medallion. What is the best way for me to escalate this. Is there a magic email or phone number?

I have flown Vietnam AIrlines after this flight and received skymiles the next day but I make sure at checkin that my skymiles number is added.