burnt food and bad service

On the 16/02/2015 my boyfriend and I went to goodwood spur. I ordered the texan blaze burger special and he ordered thebeef burger special with mushroom sauce. He informed me that the burger was burnt at the bottom (the side facing the bun). I told the waitress who was there and she merely shrugged it off. We took the remaining burgers as take -aways. When we got home we saw that the saucew for the texan blaze burger wasn't included in the take away and that the second beef burger was also burnt and there were no onion rings. Since when is it okay to serve burnt food to a paying customer and to to give the complete meal as a takeaway.