I usually had very little problems selling a few personal designer items on eBay via the global shipping, however within 1 day I seem to have 2 issues selling.

First one is a Prada dress a buyer in the Netherlands bought (feedback of 1 over years of being a member) the dress arrived on the 15th, on the 2nd of June she starts a return, because I am nosy, I gave her name in and Netherlands as location and it showed me a social media account where on the 20th of May she posted pictures of her wearing my dress, also the pictures she provided as "signs of wear" are just the dress with creases, no signs of wear. I had to jump through hoops as I had to provide her with a return label and she refused to give me her address, however the time span is very short to provide a return label, so I agreed with a hotel in Amsterdam to use their address as a the shipping address and uploaded the label, eBay was totally unhelpful. So the Global Shipping is a serious risk, previously I luckily had honest buyers.
The other one is a very rare vintage dress, a buyer made such low offers and the conversation was off, you could tell she wanted it for nothing so I decided to go with my gut feeling and block (that was yesterday) then a new buyer with the same post code (you can see the post code if a seller makes an offer) the account created the same day, the same postcode, clearly circumventing the buyer block, I tried to report it but apparently there is no report feature and the "customer service" just sends me AI slop like "if you use the prepaid label you are fully protected" - not sure how that protects me if the buyer damages my item on purpose? Because nobody will look at your evidence, I provided them with screenshots of the buyer from the Netherlands wearing my dress to parties and events, nobody seems to be interested.
Where is the point of having a buyer block if a buyer can just circumvent it with a new eBay name?