Cee ́d 1.6 CRDI no longer running high pressure pump?

Hello dear Kia municipality , have here a Kia Cee ́d BJ: 09/2007 1,6CRDI 90PS The car was driven without any problems then for about 2STD. parked since he no longer jumps on , was refueled before 300KM . and the tank is half full . Engine turns but does not come . Since Monday the car was now at B….Service the alleged diesel professionals . After the one pre-shipment pump have ordered for 350€ and then have found that the no pump has on the tank . have disassembled half the car incl. steering wheel cladding rear seat and theverse things in the engine room on Friday said the master then that would be then probably the high pressure pump for limp 600€ in exchange. Since I have only heard up to Dato conjectures and excuses I was extremely angry and took yesterday the half disassembled car away there. Then the master said then that they have torn off the diesel line to me while trying to disassembly the pump. As said the car is now here and I do it the same he ….. I got the high pressure pump for 430€ and hope now that it is also really. How does the diesel line on the pump go off ? Not that I break the other line now … Do I have to pay attention to anything when expanding the pump ? I find unfortunately no instructions on the internet what is to do . And now I am quite confident that you can give me tips or a guide , help . I have already out the 3 screws of the pump . on the other since e I have unscrewed the cap behind is now the conical shaft pump which is attached with a nut. Thank you in advance