Defy Reuses to supply Wiring Diagrams

My neighbour moved her Defy glass hob and under cover oven to a new location inside her cupboard. Unfortunately the people moving the equipment did not make a note of the connections of the swarm of wires going between the two units so could not connect the two together again. As a retired NTD Electrical Engineering Light Current Technician with 34 years in repairing Mainframe Computers and Peripherals as well as Industrial Robotics I offered to help her. I could not find the relevant Defy Models Wiring Diagrams so I phoned Defy Support who stated that "they do not have wiring diagrams" so I stated that I would never buy another Defy product again and slammed the phone down! I currently have 6 Defy products in my house....3 of which are brand new.....if I knew that this was Defys' attitude I would not have bought the 3 new appliances from Defy! Defy obviously want us to use their" licenced Technicians to come out and do the connection at great expense while I have more Electronics knowledge in my pinky than these "Technicians" have! I insist that Defy supply me with the wiring diagrams that I require or I will take this matter further!