Wheel change at V50???

Hello, yesterday I tried to change my winter bikes with my Volvo myself, because I didn’t get an appointment in the workshop at short notice. It’s not the first time that I changed wheels with different cars, but never as unsuccessful as with the V50!!! When I released the five wheel nut and cranked up the car, the bike was still bomb-proof, so I couldn’t take it off. My suspicion that I had to solve the mother in the middle of the hub was also wrong – I hope I didn’t make a mistake… Can someone give me a tip on what I have to do and change the wheels!? Greeting colmans