How can reset my BEKO WMA 765S washing machine?

I have the above washing machine and a 30 min cycle is lasting ALL DAY!!! it stops the cycle after about an hour but wont let me open door, i then manually select spin which it does. sometimes this is ok but other times it is either still soaked or still wont let me open door! it is driving me mad!!! i have tried holding start/cancel button while turning on etc but this still seems to not be enough it is as though the brain is dead and it cannot tell the time. PLEASE PLEASE HELP!!!! just to confirm it is a BEKO silver WMA 765S washing machine 8 kg load