A part is a complete product. It's using someone else's idea - the person/company who originally designed it and sells it with the original brand name.

A part made by someone else other than the original manufacturer is made exactly the same as the original and works exactly the same, otherwise it'd be useless. It may be made from inferior materials and won't last as long but otherwise it's exactly the same product.

Whether they're fakes or illegal copies being soldl, or whether it's the keyword spamming or other issues that's the problem, unless the OP changes their practices and stops breaking the rules they won't be able to sell them, end of story.