disgusting food and terribly customer service

went to McDonalds in Westgate mall my daughter and I for a quick bite before we hit the road again I got a big mac Nd she got a quarter pounder with cheese , we were chatting when she said the burger doesn't look right , i took it and smelt it and said it smells funny , I said to her take it to them and tell them it smells funny. She gives it to the lady at the desk and tells her that burger taste and smells funny (the couple that sat in front of us also returned their burger twice) she takes and and laughs whilst telling her colleague in Xhosa she says its smells funny, at which point my daughter walks away cos what the hell is so damn funny. another Gentleman then calls her to say its a beef burger it smells like that and gives it back to her, I took it back to the counter and gave it to the guy that was assisting with the uber eats orders told him to look at it (looked slimy) and smell decide if they will eat and they can keep it and we left. I have 9 kids we frequent mcds quite often , and never have we been served something so foul and the level of service is something to be frowned upon you guys need to train your ppl better in customer service , I would definitely not want them part of my sales team. disgusted for days