Is the car scrap?

Hello, my ten-year-old Kangoo has recently broken back right the rotary rod. The Renault workshop has (allegedly) made every effort to get the rotary rod out, but without success. Now the whole rear axle has to be replaced; cost point: 2000 €. Since the resale value of the car is not much higher in the repaired condition, however, I shy away from it. On the other hand, it would be a pity for me to have my loyal companion. The workshop has bathed the whole rear axle completely 2 days in rust solution, without having done anything. But maybe you can move the thing with raw force / spanning. Maybe you could also install the rear axle of an otherwise scrapy Kangoo with me. I don’t trust myself, though. Is there someone in Berlin who does something like this? Where can I get a spare part dispenser? Is such a transplant even meaningfully ll?