I have been trying for an hour trying to buy two first class tickets sept 21 2024 from Zurich to montreux via interlaken ost via zweisimmen . When i select buy it says technical issue, try again later. I have been trying for two days. What’s up with this. I already have reservations for a premium seat . But have to buy the tickets. On the train. What am i to do. Have tried chat and they arent available try later. What’s up with this.