just had new pump installed in my dishwasher ?

hii have a beaumatic dishwasher , it wasnt filling up with water , engineer came out said it needed new pump ,so pump was ordered. 2weeks later engineer came to install new pump, 2days later dishwasher is still not working showing E3 , called engineer again to say it not working, so they said they would send some one out following week, am call out, had to go work that day so father in law came over to let engineer in .He waited up to 1pm no engineer,father in law left, when i came home found card in door saying engineer had called at 1.20pm no one at home ,so i called the number on card asking for new appointment they told me becuase the engineer callled and no one was at home i have to make new appontment and make another payment, when i said to person on telephone that i was supposed to have am call out ,the reply was well there am call out is up to 2pm tut does any one know what the E3 means and what i can do ty