Lost Stroller/damaged suitcases/no meal for child

Booked our trip to Melbourne in June 2015 myself,my 2yr old son & parents to leave Jhg on 25 December 2015. When booking requested a child meal on all flights to Melbourne. Not once did they request that I confirm the meal for my child.Leaving Johannesburg I see the flight attendants handing out special/child meals,when asking they check their piece of paper and get told that my son's meal was not confirmed before the flight and reason why he is not getting one.All the way to Australia my son had to eat from my food.On arrival in Melbourne our suitcases nor stroller arrive,gave our stubs to the ladies that were helping with lost luggage and promised that we'd receive our luggage the next day!Our bags arrived the next day but no stroller,we called and nobody could help us, we then sent a mail and received acknowledge of receipt of mail.We then called and mailed a few days later,nobody called or mailed us back.I had to go out and buy a stroller as i cannot carry my son around.Bought a stroller and have sent in the claim and nobody responds to mails or to calls.On returning from Australia our bags were heavily damaged.Confirmed meal for my son,he only got 1 meal on 3 flights.