Cunard customer service sucks

This should have been an amazing review but I was refused boarding to queen Mary 2 because I had a temporary British passport. It was specifically issued for my cruise with full details of the ship snd every port it stopped at. Issued by the British consulate in Cape Town. They even told me South African ports wouldn’t accept it although I’m a South African permanent resident. I have travelled through two of the countries on the itinerary without incident from their immigration in an effort to be admitted to the ship But they refuse to budge. I wanted my son and I to have the holiday if a lifetime after he suffered a massive heart attack and I recovered from a stroke but it’s been a nightmare and my money has all gone trying to sort it. They have made no effort to help