If there's nothing in the reservations overview, then the booking didn't work. You'll get your money back eventually, or you can request a full refund via customer service:
https://eurail.zendesk.com/hc/en-001/requests/new
That also means you'll need to book again:
- 1017h Bruxelles to Valence: via SNCF, NS or NMBS (ticket office or by phone).
- 1514h Valence to Barcelona: SNCF by phone. Press #85 for English; reservation will be sent via email. Other options in this post.
- 2015h Barcelona to Valencia: not possible online. See this post for the options.
- 0910h Barcelona to Paris Gare De Lyon: see Valence-Barcelona above.
- 1725h Paris Nord to Rotterdam Centraal: online via NMBS (booking fee 4€ per order), or via SNCF, NS or NMBS (ticket office or by phone).