Can you double check the model number please as its not comming up.
Also when you had the back off was there a thermostat at the bottom and 1 up near the top aswell?
Ok there should be a thermostat up towards the top oven aswell on the right hand side.
This is the thermostat you need to check out with a multimeter. As usually if the top oven and 3 of the hotplates wont work then its usually this thermostat thats the problem here.
So meter the top thermostat out and see what you find.
Let me know how it goes.
No theres only the 2 on there the top oven and the lower oven.
Have you checked the connections on the mains therminal box on the back and make sure there are no loose wires or the box hasnt burnt.
As if you have replaced the top oven stat and the selector switch then it may be the box not sending the power up to the thermostat.
If you just want a user manual then you will be best contacting beko themshelfs and they will be able to either email 1 to you or send 1 out.
Ok you wont get a repair manual for this im afraid.
As they wont give them out and they are very hard to come by im afraid.