It IS Nintendo's fault for not offering good customer service here. The only support email listed on the official Nintendo site for my country,
www.mojenintendo.cz, *goes to only 1 person* which responds after a week or two. When we had a problem with my Switch being locked, we managed to brute force the PIN before they sent us the key.
Plus, it isn't even Nintendo support, it's support for a company called ConQuest that is only authorized to distribute Nintendo consoles and nothing else. When we sent our broken-out-of-the-box joy-cons to them for repair, they only stated that "the damage done was mechanical and you'll need to shell out for a repair, even though you have warranty". Like, that isn't even fair.