Great promotion with CHF 5.00 Cumulus voucher to get a ticket voucher worth CHF 24.00. However, when I redeemed it yesterday, the ticket only cost CHF 18.50 and the voucher could not be redeemed. The woman selling the tickets did not want to, could not or was not allowed to accept the voucher because no change could be given. Even waiving the change did not solve the problem. Presumably the exchange in the Cumulus store cannot be reversed? At least I can't find an option anywhere. :-( So if anyone is interested in a CHF 24.00 ticket voucher for the Stanserhornbahn, please let me know!