A few months ago I bought an apple watch at eBay auction and it came locked and with access code.
The watch is linked to another phone.
I've searched for tutorials and videos on how to unlock.
I have only been able to delete the access code and access the menu.
When I want to link my phone with the watch, it tells me that the watch is already linked to another phone.

I contacted the seller and the seller ignored and has disappeared. I have been scammed.
How can I unlock it? they sold it to me locked