Can’t edit product title nor description

I am hoping that you can help me understand the problem. Sorry if this has been posted before.
The agent keeps repeating the same thing which doesn’t make much sense to me other than they are trying to get some kind of proof from me. But what they ask for I don’t have since my product is a standard white label item which is not brand registered.
Here is the request they give me:
Before we can update the title suggested by you, we need you to provide us any one of the following valid forms of documentation as proof for updating the title :
1. Manufacturer’s website link clearly showing the suggested title, along with visible product identifier (UPC, European Article Number (EAN), if available.
2. High-resolution product pictures, clearly showing the suggested title change, along with a visible product identifier (UPC, European Article Number (EAN).
3. A high-resolution photo of the item in its original packaging with the title suggested by you, showing the product identifier (UPC, European Article Number (EAN).