Eight times I was promised a response; eight times none came.

1) On April 14 I spoke with a customer care rep on the phone about some issue. I was promised a supervisor would call me back. No one did.
2) On April 17 I called again, was promised again, no one did again.
3) On April 20 - same.
4) On April 23 I called again, and a supervisor told me to email the issue. I did, received an automatic confirmation of my email. No one ever responded.
5) On May 2 I digitally submitted a complaint, and received a case number and a promise I'd get a response. None came.
6) ON May 21 I used the feedback function to complain about the silence. A rep called me, told me that someone would call me within 3 days, and that she will call back afterwards to verify that is had been done. No one called back.
7) On June 3 I called; spoke with a rep; she sent a message to two different supervisors, and promised to follow up. No one called me.
8) On June 4 and 5 she called to follow up, and twice re-sent the message to both supervisors. No one responded to me.

I am a member of their frequent flier club and a business class passenger.
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Booking reference <PNR removed by mod>

Shame on them; shame on Etihad!