Neff S9J1F - Stuck on the Drain cycle?

Help!
my Neff s9j1f dishwasher ran its last wash cycle and then it seams the wash programe just got stuck on the waste cycle.
my thoughts are its an electronic problem but im not sure
i have pressed the reset buttons to end the cycle but nothing happens and it just remains fixed on running the waste cycle.
i tried turning of the electrical mains supply to the unit and restarting it - but again it just continued to run the waste programe cycle of taking all the waste water out.

appreciate your help