Mis-informed and *********** Etihad cost a young talent of an opportunity of a lifetime!!!

I am profusely disgusted by the service we received from Etihad Airway today. Absolutely shocking standards from a company of level. We travelled to the airport 2hrs before for a flight to Singapore, upon arrival the staff didn't seem to know what they were doing as we were sent pillar to post while they verified our travel documents. Eventually we were told that with a visitor visa, we had to produce a return ticket. Mind you this is for my nephew's scholarship programme and they had told us otherwise and given ample supporting documentation to support this. Other students on a similar program were able to travel with Emirate with the same documentation! Any so eventually after all this debacle and a very rude supervisor (Peter) who eventually blew us off, the check in attendant told us that we can only travel if we produce proof of a return ticket. While trying to arrange this we told the lady to please then not mark the ticket as a no show, she agreed and assured us there was a note that she would put on the system. We confirmed this perhaps 3 or 4 times, she told us it will be changable and the note would be valid, she then gave me a number to a call centre should there be problems. 3hrs later, after 58mins of calls the call centre tells us, there is no not on there system, and we are indeed a no show and they can't help. I'm ****ed off because these *********** people refuse to accept ANY responsibility for mis-informing us repeatedly. Had we known, we would be a no show, we would have acted otherwise alternatively! I've gone off with these people for 3 long calls with the supervisor Ahmed and it's like talking to a robot. Etihad simply refused to acknowledge that it was their incorrect information that led to this whole mess and they need to accept some responsibility. It's absolutely appalling how my nephews misses out on such a great opportunity at the cost of a company with no honesty, no integrity in their service or knowledge of their own rules!!! I demand this be escalated and fixed. I will not stop here.