Bad delivery service

Last night we ordered McDonald's online, at 18:23 they confirmed that they have received my order. At 19:01 a lady from the Lambton branch phoned and told us that our order was ready they were only waiting for the delivery guys to come back, so I asked her if we can change the order as online it does nog llt give the option to order a Mcfeast Chicken as the website does not give the option online and to remove the onions as my husband is allergic to the onions. The lady told me its fine she will change the quote and then deliver. At 19:23 they send an email confirming that our order is on the way. At 20:05 I've phoned in store to check up on the order and they told me its on the way. The drover stopped at about 20:10 we the original order we placed online. Now my food is ice cold as it was ready from 19:00 and they didn't deliver the food we requested. I had to s**** off the onions from my husband food which left the burger dry. I phoned in store just for a manager to tell me he does not know what I'm talking about or that no one knows about my order that has changed. McDonald delivery services is bad to the point that we don't even wanna buy from McDonald's anymore and we buy McDonald's like 5 times a week if its not more. Why do customers that pay extra for a service get the worst client service ever? Please investigate my order from Lambton ********** 354