Hi there,

I booked a British Airways flight operated by Japan Airlines.

I really had problems reserving seats. It took about a couple of days.
I called BA, not responsible because it was operated by Japan Airlines. I'm supposed to call Japan Airlines.
Japan Airlines called, not responsible because the tickets were issued by BA.

Then I went personally to the Japan Airlines office, they can't do anything. Also called Japan Airlines London, no chance. BA must reserve the seats.
Then by coincidence I wrote BA on Twitter and they reserved the seats for me without any problems.

Well, the problem doesn't end there.

I had to rebook my flight. And so I lost the seat reservation.
Thought no problem, write BA on Twitter again.

And what's the answer now. I should contact Japan Airlines. ...?!
I explained to them that they had reserved seats for me here on Twitter and I also sent screenshots of that.
I was only told that it was right, they would only call OneWorld Desk (What is OneWorld Desk?!) And OneWorld Desk would then call Japan Airlines to reserve a seat.
They can't do that and I'm supposed to call Japan Airlines. (I think because of the situation at the moment?)

Okay, I'm calling Japan Airlines again. Give all of my details ... "Ohh, I see you booked the ticket with BA. Unfortunately, you have to contact BA."
I'm going crazy! I feel like a ping pong ball.

At JAL, I cannot log in to the booking at all.

I wrote BA's Twitter account again, I hope that they will reserve my seats as before.

Who is ultimately responsible for the seat reservation? What can I do if everything doesn't work?