I’ll keep the thread updated for future reference of other readers.

this is the AI generated answer I got:

Dear Mr. Tenerani,

I completely understand how upsetting this situation must have been for you, especially since you have also arranged hotels and other parts of the journey around these flights. Please accept my apologies for this inconvenience and disruption caused.

The cancellation of the bookings was made by Ethiopian and unfortunately availability is controlled entirely by the operating airline. This means we are unable to reinstate the original booking even though we would like to resolve this directly for you.

What we can do immediately is refund the tickets in full and return the award miles used, so that you may issue new tickets based on the availability currently offered.

Please let us know if this works for you so that we may proceed with the refund immediately.

Once again, I am truly sorry for the inconvenience and disruption this situation caused. I look forward to hearing from you.

Yours sincerely,
E. P.

I reiterated my requests and the fact that the ticket is with Aegean and not ET.