Oh, that sucks. I used my same ID created on ebay.com for shopping, or even selling the odd thing or two, while travelling to different continents ever since I created it in 2009. It still seems to work on the different storefronts with the same ID (.com, .co.uk, .de...) like Amazon, and keeps the international addresses I added before.

I've seen stories of ebay/paypal account closures for people who were <18 at the moment of signing up, getting honored a decade later. Not sure about if your multiple accounts had anything to do with it. I think I'll avoid making any changes to mine, except shipping addresses while travelling.

Honestly I just avoid them these days, they promoted too hard their full service international shipping for US sellers, which was always much more expensive than standard USPS, and really slow, but it handled the whole customs thing if your package ever got caught, because the custom duties were pre-collected. Still unreasonably slow, considering most of the time the packages were weeks in the US bouncing around before even leaving, whereas something coming from China or Europe, which used to take 1.5 months a decade ago to Chile, now get to the door in as little as a week.