suspicious and incorrect debit from my bank account

There have a been 2 suspicious direct debits from my bank a/c on the 30th Nov (for 89.31euro) and on the 15th Dec (for 78.47 euro) by NS GROEP IZ NS REIZIGERS. Please find the screenshots of this transaction below.

I called the NS customer service number before to understand what's going on and they could not find any transactions, invoices, subscriptions or travel details in my NS account. Could you please help me with this?