Article can’t be used as Code missing

Hi there, I purchased an article last October called Flowneuroscience.  It’s for depression.  My Gp wanted me to wait until my medication was sorted so only  expected to start using it today 16/1/25.  It is working ok but can’t be used without an authentication number which the first owner gets.  This is the second part I have now found to be missing as he sent it without the USB lead and did eventually give me £10 to buy one.  I am 78 and have severe depression and don’t know what type do as the person wasn’t pleasant the first time .  I have written to the makers and they say I need to get authentication number from first owner.  This is an example of selling an item, putting new on it and not realising what he was doing.  Where do I start please". Thank you

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Article can’t be used as Code missing

You had 30 days from delivery to open a case for not as described, so there is nothing you can do. Ebay will not get involved. You need to try engaging with the seller again.

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