I want to refund cubase. but i don't know how to refund cubase

I bought ‘cubase 12 upgrade from 11’ last month. but I had to buy ‘cubase 12 upgrade from 12Artist’. so I want to refund it and I want to buy new thing. But I don’t know how to refunds it. plz anyone tells me how to refund it.

According to the info on the following page, refunds are only possible within 14 days after the purchase. Due to the temporary closure of the online shop, it might nevertheless be worth contacting support and ask whether a refund is still possible in your case.

The store is up again