Wheels do not depart from wheel hub

Hello community, I wanted to bring my summer bikes to my coupé today, but unfortunately I can’t get off the two wheels on the rear axle. I’ve kicked against them a lot of times, but they don’t want to go away. Besides, I loosened the screws a little bit and jerked forward and backwards with the handbrake tightened => still doesn’t go off. Finally I sprayed the wheel hubs with roast releaser, waited 5 minutes and then tried to solve them again, but i I still can’t get them down. I don’t know any more advice now and hope you can help me. lg.