Dear NS team,
Recently I changed to NS Flex which states that I do not need to load balance on my card while taking trains, trams, metros and buses. Unfortunately that is not the case, I have picked up the product in machine and I have been using it with train without problems, but then I got into a tram and received a message "betaal anders saldo te laag". How can this be? I also checked my history and it displays that cash was taken from my card during a tram ride and I no longer can use it in trams.
How do I deal with this issue?