Hello Llusuexo86
I understand that you hold a Supersaver ticket with Half Fare.
How to get the other half of the ticket to make it a full fare ticket? Simply purchase two normal Point-to-point tickets in addition at half-fare from Zurich HB to Lucerne: Use these tickets together with your existing Supersaver tickets; both together make a valid ticket.
The IR70 and IR 70 train lines are cancelled on 16/17 November due to construction work. Your ticket is valid for the S5 trains at 11:09, 11:39, or 12:09. It requires a change at Zug, however. To purchase the other half of the ticket, as I said above, simply choose an S5 connection.
Regarding the construction works, it has been communicated to the locals as part of this press release:
https://news.sbb.ch/medien/artikel/132017/bauarbeiten-thalwil-zugausfaelle-und-fahrplanaenderungen-an-drei-wochenenden
Kind regards,
Roland