Customer complain and being mistreated

I would like to launch a complain about Mr delivery app that has never treated me as a customer well,on the 27th of January 2020 i placed an order and iam from work tired and pregnant and I was tired of standing I placed an order online and i ordered spicy foldover with a milkshake a side ,And i did another order for my cousin as well ,apparently after 30mins or so the driver sent me a text telling me the store has ran out of spicy sauces they have jalapeno sauce and mayonnaise I said if they don't have it's fine let him leave because I don't want those as for mayonnaise I don't eat it, it I cancelled the oorder just few seconds after I cancelled the order the driver sent me a text he is is like ohhh now they have the sauce I asked him how come?he said they had an extra box of hot sauces I'm like ok u can bring the order because iam too hungry since they have the sauce I'll wait, he said fine,then after 15minutes he got to my place my cousin goes to fetch the order when she comes back I check it it's mayonnaise,I send Mr delivery an email ,They called me back I spoke with this other lady i think it's Thandile or whoever ,well to my surprise the lady is like unfortunately ma'am u have received what you have orderd ,iam like how possible because I never wanted anything with mayonnaise in it she is like the folder does come with mayonnaise,I tell her I'm not happy with the mayonnaise and I have never orderd a spicy foldover and it came as a mayonnaise I tell her I'm pregnant and it makes me vomit what should I do with it because I can't eat,she is like I don't know but that's what you orderd iam like if I spoke with the driver and I told him what I want and I told him to leave it he told me they got the sauce again I wasn't gonna say he should continue with bringing my order if I know it's mayonnaise because I had already cancelled and he **** to me ,she said that's unfortunate because there is nothing we can do as the company,I was so ****ed because iam tired my feet are swallen and I couldn't stand any more further to cook ,I said to he can she tell the driver to bring back my money and I will give him the food to return it,my was a R185.70 my order number was DFD***2,I am so disappointed from Mr D and Waverley McDonald's for what they did and if this is the kind of treatment the stuff of Mr delivery is having can the company just close because it's pointless to talk to people who can't assist you,may this matter be taken further hence I want to know why was I have been treated like that while Iam paying with my money ,from the Waverley McDonald's manager and Mr delivery management I need answers please.