Winter rims allegedly unsuitable

Nice Sunday Together, I only had my Cupra Leon ST for three months and was now for winter in three workshops (2 Cupra dealers and one free) and am a little surprised that I could not sell all winter bikes. For my car there would be none, you could only offer me all-year tires to pull on the summer rims… On the free market there would certainly be some, but they wouldn’t fit 100% and then possibly push against the brake blocks. Jaa, cool? Online Also always comes the message that there is no choice for my factory. Can give me a website where there are definitely suitable complete wheels. Thank you already