How can I fix my SIMPSON EZI 750 washing machine?

My washing machine is simpson EZI 750 it is working until the draining part then stop and beeps,It doesn't spin and dry,I tried to set the knob manually to the dry and spin but it just drains and the pump is still working even there's no more water to drain,it doesn't kick in to the next gear which is dry and spin.please help me,thanks