Technical problem with reclaim form

Hello, I travelled from Amstel Station to Wibaustraat  over a week ago. I was notified that I didn’t check out. I tried to fix the journey every day the last week, but there seems to be a technical problem with the onlien form. The link sent in the email gives a ‘technical problem’ message. If I try to access the form through Mijn NS, in the box for Aankomststation, it seems I need to select the station from a list, though the list is entirely blank. It does not let me type in a names. There seems to be soemthign wrong with the form. Any suggestions foward would be appreciated. Many thanks, CH