Hello, we are international travellers and we want to travel from Zurich Flughafen to Buchs SG but we accidentally booked to travel from Zurich HB to Buchs SG. We need to rebook from Zurich Flughafen itself, so we need to seek guidance on how to change our tickets purchased/ proceed with a refund. Within 30 minutes of buying our super saver tickets we noticed that when we tried to proceed with the refund, the system was down and prevented us from refunding the tickets. Now the only options to us prevent us from seeking a refund. The system was down and is now posing a grave debt for us, we are desperately and urgently seeking someone to assist urgently on this matter because we need to confirm our arrival plans soon. Moreover, we had already filled in previous forms and called the hotline thrice to be placed on hold indefinitely. Thank you so much, we hope SBB can get back to us as soon as possible.