Disappointed mother and baby!!

Im very disappointed in British Airways. I really made a mistake by choosing the airline. They didn't give me a bassinet in my long haul 11 hour flight from Heathrow to Durban, South Africa. I was travelling alone with my 6month old baby. I ended up carrying her the whole flight which was very challenging as their seats are very tight. I booked a bassinet and wasn't given one. Other mothers received one. When I approached the hostesses, they were so rude to me that I broke down crying. It's shocking to see a first world airline treating customers, especially mothers with small babies this way. I wish I hadn't booked my return flight through BA. I should have used Emirates like I always do but I have already spent so much on my ticket$2600 CAD. Why did BA charge me $500 CAD if you weren't going to give me a bassinet?? They gave me a broken bouncing chair that wouldn't recline. How is my 6month old baby expected to sit in an up right position for 11 hours. They told me they ran out of bassinets to give me. How was that my problem? I booked and specifically paid to get bassinet seats. I wish they would refund me my return flight so I can book with Emirates and travel back like a mother should!!