Charging power on the fast vein

Hello, I have been driving a Mokka-e GS-Line since June 21. In the first months it has always charged at 300 kW high-speed (EnBW, ALDI) with a load level of less than 50% with approx. 75-85 kW, until 80% then still between 55 and 65 kW. From 83% then much slower, first approx. 18 kW and then decreasing. Since mid-October, the “quick line” no longer works, the highest what it charges is less than 50% approx. 35 kW and over 50-60% approx. 18 kW. It was e.g. 6 degrees outside temperature, journey to the charging station 10 km (i.e. car / battery at least warmed) and still no more charging power. This does not improve over time, i.e. it does not charge faster even after longer charging time. A charging process of approx. 10% to 80% takes approx. 1:20 to 1:30 hours (on the fast line), in addition the range is extremely low in winter. That would now bed This is not portable. I’ve had the car for two weeks now at the dealer’s office and have received the news today that everything is so fine, and these temperatures and conditions are no longer working. If that really is the case, I think the Internet would be full of reports and complaints. However, I couldn’t do this with a single piece of paper. This is why I have registered here and I hope for your experience. Can someone charge their mokka-e even more than 50 kW or even 70-80 kW? If so, at what level of charge of the battery. Or do you all have this behavior and no one is surprised (as Opel claims). I even had a charging axe bar 2 times in my 3 documented attempts, a Fiat 500 and a Mercedes Vito e, which each have a normal charge of approx. 75 kW. all manufacturers except Tesla this problem with the slower loading in winter. But I definitely can’t believe it now… Thank you for your input!