Hello wellxxi
The purpose of this platform is to ask questions; hence we do not feel bothered.
To answer your question: No, this is not possible.
Such decisions like Half Fare Card yes/no should be taken before purchasing tickets, as Saver Day Passes are normally not refundable.
You have to purchase three full fare passes and ask for a refund of the half fare passes. You will pay an admin fee of CHF 10 per pass / cancellation.
Did you purchase the passes as a registered user or as a guest?
Kind regards,
Roland