Aliexpress Marketplace practices, be for warned.

Unfortunately with the proliferation of on-line retailers comes a multitude of "bad actors" selling knock off inferior products.  As you have learned some of the internet sales sites are looking primarily at quantity and volume rather than genuine factory quality products supported by customer service and after the sale follow up.  Please let me suggest another approach to adding high end top quality speaker cables to your system and that is to fabricate them yourself.  It's an easy, much less expensive and satisfying audiophile activity.  I've use Mogami 3103, 3104 or Canare 4S11G depending on the system power/speakers, finished with either Viborg or the house brand terminals from Performance audio where I purchase my raw cable.  You might want to check out their website if you have not already done so. lots of neat goodies for diy audiophiles.  BTW you can assemble the equivalent of $1000 plus cables for less than $150/$200 depending on cable/termination selection. Oh and no soldering needed as all of the top quality terminal ends use either dual allen set clamping screws or compression clamping.  Hope you find my post helpful.

You speak of Blue Jean Cables?  Yes, they are good especially the star quad bi-wireable  Canare 4S11.  The G version is newer but their own customer service desk told me don’t sweat the non G version especially in 10 feet or less runs. 

Ya think.

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