Hi everybody I need some help! (Antwerp)

I need some help, I'm 26 years old and I live in Antwerp. I need the train transit pass from Antwerp to Brussels 'cause I have to take the train every day ti Brussels. I went to the Antwerp central station with a certificate of my school and my International Student Card but they don't want to sell me the "Student Transit Pass" (which is really cheap) because you can get the subscription until 25 years old.
That's ridiculous! Is there anybody working or having information in the Railway Belgian Industry?
I really need that student discount....normally I should pay Protected content per month!
Thank you for anyone help,
Laura