To be fair to Etihad, they’ve done something rarely seen on this forum and have intervened.
My advice, email them quoting their intervention and if you’re still feeling aggrieved , set up a Twitter account and use social media.
Companies normally resolve grievances pretty quickly on mass social media.
Continuing to bad mouth them here just makes you sound like the TV character Victor Meldrew.
Anyway, good luck in your travails .. And LPs advice is sound. I would have got really irked at TK totally blanking me. I now just blank them.