I had a poor quality axle. And one day I couldn't unscrew it. I reported this to the factory. You need to buy a new axle. Or you can make a new thread on the old axis. A spare part is always needed
I couldn't remove the rear wheel today. The rear axle is of poor quality. I immediately did not like that it is tightly twisted. Immediately change to a good one or, as a last resort, ztto. Well I have a spare cock and a ztto axle.