Hello Merza
I assume the total cost of your point-to-point travel card is CHF 286.
No, you cannot take the bus unless it is clearly specified in your monthly subscription. It is valid for the direct train Vouvry to Châteauneuf-Conthey, only.
→ Point-to-point travel cards are never valid via different routes, unless clearly specified. It is not a zone-based ticket as in fare networks available. Apparently, the information you have got when you initially purchased the ticket was wrong.
Kind regards,
Roland
@Limeuhu12 If you do not know the answer, it is better not to comment at all; if nobody from us knows the answer, the community moderators will jump in and answer the (unanswered) question.