Traveling BA TLV - LHR - LAX on January 1st.
Got text message to say they had an equipment change:>
" We've changed aircraft for BA162 on 01/01/2020. The flight has a Club Europe seat, not a Club World flat bed. Please contact us to discuss your options. "
Spent a long time on the phone with BA, as the tix were issued using American Advantage business class award, they can't do anything. They have space available on Jan 2, but can't change it without AA approval.
Called AA, they said they don't have inventory available from BA on Jan 2, so they can't do anything. Left hand isn't talking to the right hand.

There are 2 of us in business, and one who we used a business class award for but they didn't have the award for the TLV - LHR segment, so he's in economy.

I think the taxes through LHR are based on class of service when you arrive in LHR, so we should expect a refund on that, correct?
Any tips, hints, advice or guidance are appreciated.

TIA.
Merry XMAS/Happy Chanukkah/Happy Holidays (delete whichever not applicable).