Swiss International Air Lines review by Fi

My flight back to Singapore got delayed so I needed to change my flight with Swiss Air from Singapore to Zurich. The website showed $460 for rebooking but did not allow me to proceed. I had to call customer service - took me 12 phone calls on international roaming over 5 hours to change a simple flight. They wanted to charge me 5-6 times the amount quoted and kept hanging up the call. My last call was 55 mins simply to push back the flight by a few hours. Despite telling the staff I’m on international call, she pit me on hold 15-20 mins at a time, i could hear her chatting and laughing to colleagues when I was on hold (she forgot to put the hold music on). I ended paying nearly $1000 on roaming fee, more than double what the original rebooking fee would have been, and wasted 5 hours as even when they said it has been sorted, no confirmation cane through for me to call back and found out nothing has been booked. I wrote to them afterwards to submit a formal complaint and was told they believe my issue had already been dealt with satisfactorily!