Individuals motivations for buying such a product differ. I can't speak to your decision making process but I'm willing to bet trying to "save money" while getting a look-alike product and hoping, or not caring if the performance matches the genuine product is a strong motivator for the majority customers of such companies.
If one makes an educated decision to take the chance on such a product, with all the information available across innumerable forums and reviews, well caveat emptor.
Expecting such companies to have a strict sense of customer service and business ethics is unrealistic. They know exactly what they're doing. If a handful of customers have issues and cannot be satisfied or made whole it represents a small fraction of their income. There will always be buyers for such products.
Such companies are under absolutely zero obligation to match or even come close to the performance of the genuine article they are copying-cloning-counterfeiting, let alone the real companies customer service policy.
The meter panel, or whatever it is, being held in place with cockeyed washers is a red flag. The glued in switches another. These are short cuts. Such companies, and their suppliers can make nearly anything including inferior IC's and capacitors with ANY markings they please. They know their victims customers are looking for such labels and markings. Would you have known such things about the innards before hand? Possibly. Possibly not. It depends of your level or risk tolerance. Again, caveat emptor.
You stated this post is not about the quality of the unit but the experience of buying it. I think the "quality" of the unit speaks for the entire experience. It's all part and parcel. Entirely separate from the PayPal issue 'm sorry it has not worked out for you but I'm not surprised. Beauty is $kin deep.
My opinion would be to just live with the color. It seems none of this would be an issue if not for that...?