This is not Customer Support but a Community where travellers help each other. We can't fix your reservation here.

You can reach Customer Support through this form. Write that you are currently travelling. 

https://eurail.zendesk.com/hc/en-001/requests/new

If you can't see the reservation, then there is no reservation and Interrail/Eurail will eventually refund the money for the reservation. 

I suggest that you make a new reservation at the station where you will be travelling from.

What train are you planning to take?

Thank you so much!! I am going from LILLE FLANDRES (France) - PARIS NORD (France)

You should be able to make the reservation at a SNCF ticket machine. There is an instruction for that in the link.

https://community.eurail.com/train-connections-reservations-47/how-to-get-reservations-105/index2.html?postid=16809#post16809