When I sell strategy items and I doesnt Sell I lose the item forever and I don’t get the coins or amything
Not sure I've heard of this issue. If it didn't sell it should be in your binder somewhere.
Perhaps they did sell and you didn't notice? I would double check your notifications in game and the my auctions tab to confirm.
If it turns out they didn't sell and aren't in your binder, you're going to have to open a ticket with EA help to see if there's anything that they can do for you.
I posted a ticket and they said there was no such thing