I had a KL o/w FRA-AMS-BLL which was cancelled by KL a few days prior to the flight date. Ticket is on AF stock and was paid with AF evoucher.
I requested a full refund through the Delta Platinum hotline. (This was in mid-March. I'm not an AF/KL elite and getting through on the regular AF/KL hotline was impossible. Knowing the European DL hotline is operated by AFKL, I went with them. I received an email confirming the cancellation.)
So, it's been over two months and I haven't received a refund. I guess a voucher would work for me. How would you escalate this?