Regular BA flyer (nothing wrong with them, by the way) but my experience with Singapore Airlines has blown me away. Helped me with a premium economy multi-trip plan, which BA doesn't have on its website, and then gave us front row seats when it wasn't possible to seat us together during one leg of our flights. Took about 45 seconds for someone to pick up the phone, and they did all this proactively and called me back the next day. I wasn't expecting this level of service but was blown away. Shout out to Evi, thank you!
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