It seems to me that for Maya Maya it doesn't hold that for more - you buy better. My non-expert opinion is that they have products of average quality, which they sell at prices of higher quality products. Unfortunately, we buyers are the ones who fall for it.
I think you really had bad luck and got a bad batch. But it's true that their complaint service doesn't work, just like with other Slovenian sports equipment manufacturers! They didn't want to accept my complaint at first either, but I threatened them a bit with the inspectorate, and I got what I wanted.
Regards