Sorry to bump an old thread but last night I received a call from +1 305 447 2819 listed as Miami, FL.

They called and said the flights we had booked with TG using LM was going to be cancelled and offered a refund. He knew our names, flights, routes and date. I asked for alternative flights and he said "We can't change flights, we can only arrange a refund."

I know my rights and generally airlines offer an alternate flight or a refund. I declined and we wound up the call.

I called LM who said they have no record of any notification from TG or any record of a call and the number was unknown to them. I also called TG who said the flight was still scheduled.

So I now conclude it was a failed phishing attempt. Perhaps if I agreed to a refund he would have asked for my cc details, which I would have questioned because all my past calls have the pax enter their cc details using their keypad.